Encrypt DB2 backup

I have a requirement to encrypt DB2 backup using TSM. I'm unclear on how to setup the correct INCLUDE.ENCRYPT statement. I can get the encryption to work using INCLUDE.ENCRYPT /.../* but that means I'm encrypting everything. If I just want to encrypt one database then how should this statement be constructed ? The filespace of DB on server is "/PSAPPREP", tried that but no encryption occurred. The filesystems that house the db are /database/psadevel/ts1 and ts2. I've tried that also but no encryption.

Thanks in Advance
Andrew..