How to execute AS/400 PGM with TADOCommand component

Hello,

    I try to execute an AS/400 program with a TADOCommand using "CALL
PROG(?)" sintax, but I have several kind of errors,

Any of you have a example of how to do this ?

Regards.

ps
I am using IBM AS/400 OLE Provider.
Delphi 5 upd 2
IBM Client Access.