Connecting DB2 to WebSphere

I am making a simple login CMP ejb , I have to connect the websphere studio and db2. I have not installed db2 on my machine and am using db2 default 8.1 drivers. I am getting the following error during runtime.

StaleConnecti A CONM7007I: Mapping the following SQLException , with ErrorCode – 1,013 and SQLException 08001 to StaleConnectionException:COM.ibm.db2.DB2Exception:[ibm][CLI Driver] SQL1013N The database alais name or database name “BANKDB” could not be found SQLSTATE-42705.

I am new to WEBSPHERE. Please help me .
Gaurav
Project trainee
AAKIT TECHNOLOGIES.