Oh. Naturally. Life would be a lot easier if it were a networked printer.
Well, you know the AS400 has its own language (EBCDIC) so I'm wondering if that is why you are getting the garbage. There are some converters in the bos filesets that might be able to help you. Or, the AS400 may have to be configured to change your ASCII spool file to EBCDIC so it can be printed without garbage. Do you have an AS400 sys admin you can work with there.