Yes, the normal SAP Meassaging work fine. There must be an mistake by setting the parameters in the printing program.
Did you already check, if the Form is processed and the parameter REQIMM in SFPOUTPUTPARAMS
is set?
Which printing program do you use, or do you develop a custom-made?
I think your mistake is by setting all the params right here, because if the printer is not configured well, you won't get a spool, which you can preview.
Regards
Florian