Connection error while testing connection in designer

Hello BO Gurus,

We are implementing dataservices on top of dataservice iam creating universe,please tell me the process how can we build universe on top of data services server.

Iam trying to create ODBC connectivity to oracle.

But while testing the connection in designer iam getting the following error.

"DBD: ORA-12154: TNS:could not resolve the connect identifier specified"

I come to know we need to give our BO reference in TSN.ORA file.Please provide the syntax how can we give our BO reference in tsn.ora file.

Any solution would be appreciated.

Regards

Mahesh