SSRS Data SOurce Test Conection error

Hi All,

I have SQL 2012 SSRS installed. When iam trying to Use DataSource type as Oracle from BIDS test connection is succesful.

But when i test the connection in report manager iam getting a error. Please help.

The error is



Attempt to load Oracle client libraries threw BadImageFormatException. 
This problem will occur when running in 64 bit mode with the 
32 bit Oracle client components installed.