In DB2 version 7.2, Version 6 Control Center clients prior to FixPak 6 and version 7 clients prior to FixPak 2 lose nearly all functionality when used with DB2 version 7.2. To fix this, upgrade your Version 6 clients to FixPak 6 or later, and your Version 7 clients to FixPak 2 or later.
There should be no problems introduced against downlevel Control Center clients by applying FixPak 2 to a DB2 server.