Making music with a soundcard seems a lot easier than using a soundmodule.

I'm using a simple soundcard for the MIDI I/O, using the joystick-port with a splitter cable.
The problem now is that I can change the program, but only on channel 1.
What could be the cause of the problem?

From now on I only have 1 week the decide wether I'm going to keep this module. Wouldn't it be an idea no to keep it. It all seems so difficult, and I just want to make some nice midi's........