Reading and writing data to a list in Sharepoint 2010.

I'm having difficulty writing data to a list in sharepoint 2010, the reading the information is going fine, but I just tried writing data, and it's not working well.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ListQuery.StudentsList;
using System.Xml.Linq;
using System.Net;
namespace ListQuery
class Program
static void Main(string[] args)
XNamespace ns = "#RowsetSchema";
ListsSoapClient soap = new ListsSoapClient();
XElement query = new XElement("Query");
XElement options = new XElement("QueryOptions");
XElement view = new XElement("ViewFields");
soap.ClientCredentials.Windows.AllowedImpersonationLevel = System.Security.Principal.TokenImpersonationLevel.Impersonation;
XElement list = soap.GetListItems("Students", null, query, view, "900001", options, null);
foreach (XElement descendent in list.Descendants())
descendent.SetAttributeValue("ows_fullName", "I am sparticus");
soap.UpdateListItems("Students", list); // ERROR LINE
var asdf = from x in list.Descendants()
where x.Name == ns + "row"
select x.Attribute("ows_fullName").Value;
foreach (string blah in asdf)
Console.WriteLine(blah);
Console.WriteLine("\n\t--Process Completed--");
Console.ReadKey(true);
I wrote a comment showing the line where the code had a break in execution. The error I'm receiving is this,
"Exception of type 'Microsoft.SharePoint.SoapServer.SoapServerException' was thrown."
Any help is appreciated, thanks!

Puil, I decided to go with your idea, but when trying to connect to the data source at listdata.svc using the add data connection wizard, at the very end upon clicking finish I get an error "System.Exception", this is what shows up in my error list.
Error 1 Custom tool error: Schema specified is not valid. Errors:
(0,0) : error 0005: The 'Name' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Relationship' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item_CreatedBy' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0005: The 'FromRole' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Relationship' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item_ModifiedBy' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0005: The 'FromRole' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Relationship' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item_CheckedOutTo' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0005: The 'FromRole' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Name' attribute is invalid - The value '__10Item_CreatedBy' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Role' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Type' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0019: Each type name in a schema must be unique. Type name 'Microsoft.SharePoint.DataService.' was already defined.
(0,0) : error 0005: The 'Name' attribute is invalid - The value '__10Item_ModifiedBy' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Role' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Type' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0019: Each type name in a schema must be unique. Type name 'Microsoft.SharePoint.DataService.' was already defined.
(0,0) : error 0005: The 'Name' attribute is invalid - The value '__10Item_CheckedOutTo' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Role' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Type' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0019: Each type name in a schema must be unique. Type name 'Microsoft.SharePoint.DataService.' was already defined.
(0,0) : error 0005: The 'Name' attribute is invalid - The value '_10' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'EntityType' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0005: The 'Name' attribute is invalid - The value '__10Item_CreatedBy' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Association' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item_CreatedBy' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0005: The 'Role' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'EntitySet' attribute is invalid - The value '_10' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Name' attribute is invalid - The value '__10Item_ModifiedBy' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Association' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item_ModifiedBy' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0005: The 'Role' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'EntitySet' attribute is invalid - The value '_10' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Name' attribute is invalid - The value '__10Item_CheckedOutTo' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'Association' attribute is invalid - The value 'Microsoft.SharePoint.DataService.__10Item_CheckedOutTo' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TQualifiedName' - The Pattern constraint failed.
(0,0) : error 0005: The 'Role' attribute is invalid - The value '__10Item' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed.
(0,0) : error 0005: The 'EntitySet' attribute is invalid - The value '_10' is invalid according to its datatype 'http://schemas.microsoft.com/ado/2007/05/edm:TSimpleIdentifier' - The Pattern constraint failed. c:\users\wileym\documents\visual studio 2010\Projects\ecomms\ecomms\Service
References\studentList\Reference.datasvcmap 1 1 ecomms
It seems the schema is all wrong... Any help would be appreciated.

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