IDT- ODBC /OLEDB drivers are not visible while creating the connection

Hi,

• I am trying convert universe from unv format to unx format. When i clicked convert .unv universe am getting the error saying "Specified RDBMS is invalid: MS Sql Server 2008".

• I have created DSN in both 64 & 32 bit drivers and universe, reports are working with unv format. But why am getting this error?
• Then i tried to create ODBC connection from IDT to "SQL Server 2008 R2".

          Am able to see only JDBC drivers under Drivers-->Microsoft-->MS Sql Server 2008

          but there is no option to select ODBC /   OLEDB drivers.

          Is the error because of this? If yes, what should i do?

Please help me

Thanks in advance.