Mainframe DB2 Stored Procedures

Has anyone ever successfully called a COBOL DB2 Stored Procedure on the mainframe (e.g. OS/390) from a desktop client program? I’m specifically interested in Crystal Reports, but I’m trying to get one to run from PowerBuilder 6.0 as well. I’m alsospecifically interested in returning a results set from the procedure. I have a stored procedure written in COBOL that can be called from another COBOL program successfully, but as yet not from a PC client program. It is recognized in the client (using DB2 CAE through DB2 Connect to the mainframe), apparently through the DB2 catalog, but the COBOL load module does not appear to execute. Thanks in advance…