Find Sales Order Item Basic Data by Elements query fails

Question

I am trying to consume Find Sales Order Item Basic Data by Elements in .NET 3.0.
Every thing appears to be working fine -- I could query by PO number, Creation time, SalesOrganisationID etc.
However, the most basic query is mysteriously failing. I just want to query by Sales order number, and have given a valid sales order number 6718 that exists in SAP.
It fails giving the following errors:
(in Log.LogItem.Note variable):
<b>"Conversion failed: Invalid input format"</b>
(in Log.LogItem.TypeID variable):
<b>"701(SFB)"</b>
Code is pretty simple, and I am just trying to query Saler Order number 6718. Of course there is nothing wrong with its format.
From the ESOA site, all I could get was:
<i>----
QUOTE -
The following values are optional selection criteria for restricting the search result:
SelectionByID – Document number range
INCLUSION_EXCLUSION_CODE
INTERVAL_BOUNDARY_TYPE_CODE
LOWER_BOUNDARY_ID
Value
UPPER_BOUNDARY_ID Value
Value
UNQUOTE -
</i>
I could not even have any  documentation on what to put in InclusionExclusionCode, and IntervalBoundaryTypeCode. They apper to be some Global Data Types for which I couldn't find any documentation. By sifting through Wiki, I just guessed a couple of values praying that it may work. I am a bit new to ESOA, but have expertise in .NET 3.0. Would someone guide me where to find the documentation for that, where are the error codes listed, so that I make the queries with little better preparation.
            querydata.SelectionByID = new SalesOrderERPItemBasicDataByElementsQueryMessage_syncSalesOrderERPItemBasicDataSelectionByElementsSelectionByID[1];//Single element array is good enough
            querydata.SelectionByID[0] = new SalesOrderERPItemBasicDataByElementsQueryMessage_syncSalesOrderERPItemBasicDataSelectionByElementsSelectionByID();
            querydata.SelectionByID[0].InclusionExclusionCode = "E";
            querydata.SelectionByID[0].IntervalBoundaryTypeCode = "6";
            querydata.SelectionByID[0].LowerBoundaryID = new SalesOrderID();
            querydata.SelectionByID[0].LowerBoundaryID.Value = "6718";
            querydata.SelectionByID[0].UpperBoundaryID = new SalesOrderID();
            querydata.SelectionByID[0].UpperBoundaryID.Value = "6718";

Answer 1

How do you test with a SOAP Client  - I am trying to use same dataset as provided?
I did with WSDL Test - SAP, SOAP Client and got the following error:
<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
   <soap-env:Body>
      <nr1:SalesOrderERPBasicDataByElementsResponse_sync xmlns:nr1="http://sap.com/xi/APPL/Global2">
         <Log>
            <MaximumLogItemSeverityCode>1</MaximumLogItemSeverityCode>
            <Item>
               <TypeID>701(SFB)</TypeID>
               <SeverityCode>1</SeverityCode>
               <Note>Conversion failed: Invalid input format</Note>
            </Item>
            <Item>
               <TypeID>701(SFB)</TypeID>
               <SeverityCode>1</SeverityCode>
               <Note>Conversion failed: Invalid input format</Note>
            </Item>
            <Item>
               <TypeID>701(SFB)</TypeID>
               <SeverityCode>1</SeverityCode>
               <Note>Conversion failed: Invalid input format</Note>
            </Item>
            <Item>
               <TypeID>701(SFB)</TypeID>
               <SeverityCode>1</SeverityCode>
               <Note>Conversion failed: Invalid input format</Note>
            </Item>
            <Item>
               <TypeID>701(SFB)</TypeID>
               <SeverityCode>1</SeverityCode>
               <Note>Conversion failed: Invalid input format</Note>
            </Item>
         </Log>
      </nr1:SalesOrderERPBasicDataByElementsResponse_sync>
   </soap-env:Body>
</soap-env:Envelope>
Thanks..
Vikas