ODBC Driver (for SQL Server 2005) unable to retrive CRecorset's fields values

I am using MFC ODBC classes in my VC++ application for database accesss (on a SQL Server 2005 Database).
After opening a Recordset I have to use the CRecordset::GetFieldValue( LPCTSTR lpszName, CDBVariant& varValue, short nFieldType = DEFAULT_FIELD_TYPE ) method of the CRecordset object to obtain field values. The above method works fine with ODBC drivers for Jet but when I use ODBC for SQL Server it throws the following exception.

State:S1002,Native:0,Origin:[Microsoft][
ODBC SQL Server Driver] Invalid
Descriptor Index

I don't understand why the Microsoft SQL Server ODBC Driver is throwing this
exception.

Please help me!

Michael.

I am having the same exact problem! Does anyone have any input?

Jon