Changing the existing dataset

I have a report that has been developed by a past developer and for the life of me cannot understand how he even created it. I need to change the list of database fields in this report to include an additional field. But the report is not connected to a db and receives the sql command by setting the rpt properties from an application. I have the code for the app and have changed the SQL statement to include the new fiield - but i can't find anyway of adding this field to the report without it being connected to a db.  Any thoughts on this are greatly appreciated.  If you need anymore information, just ask.

Are you sure you are going to be developing in VB .NET?It is deffinitly VB .NET using Visual Studio 2008.  I have the code for the app.
If you don't know then not sure I can help you
As for class path and xml it could be either JDBC database driver or could be ADO.NET and a XML file with the structure embedded in it.
It is an ADO.Net driver.  The rpt object is created in the VB code and all properties for the report are set from the code - including the command object and the db connection.
So what database are you connecting to and how are you creating the updated field list?
This is the whole issue - i have the db in MySQL but can't seem to recreate a connection in the report to the db without creating a new connection.
What version of Crystal Reports Designer do you have installed, for editing reports? If you don't have a Designer then you'll be doing htis in the .NET IDE?
correct - i am using the .NET IDE for the report edits.
Either way, set Location to what ever DB source you are using.
Again - this is the whole issue.  I can't create the connection on the existing command without the classpath or xml file.  The xml file doesn't exist and I am not sure what the classpath is.

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