I've owned that kit and it is finicky. All the headers on the Williams boards need be clean. Your power supplies also need to be rock solid. By rock solid I mean freshly capped with good header and cable contacts.
This was working at some point for you correct?
Reset line is vital. Also check the ribbon cable that attaches from the CPU daughter card to the sound daughter card to be sure you don't have any loose or broken lines. Playing with the kit often causes the hot melt glue (used to re-enforce the wire) to come loose and then the wire(s) easily break off.
The sound board also has to be configured properly (jumper configuration per Clay's instructions). However if it was working then your
probably good there