Hello Raj,
The installed version of your ODP.NET driver must match the version of the program where you want to use it. If your application runs as x64, then you need to have installed the ODP.NET x64 version. Is this the case on your machine? The appropriate driver can be found
here.
Additionally please check if you have the appropriate factory entry in your machine config. See the following as an example.
If you are working with the Oracle ODP.NET instant client, then you might find this discussion on
stack overflow interesting.
Hope this helps.
Do come back if you need further assistance.
Greetings,
Ralph
the Telerik team
Q3'12 SP1 of OpenAccess ORM packs Multi-Table Entities mapping support.
Check it out.