Unlucky man. Its possible that you gameboot is too long, ten seconds tends to be ideal, although I have had ones as long as 17 seconds. Try a shorter gameboot, and make sure you have the time delay correct via your opening plugin.

While on the subject, anyone know how to convert at3 files* to WAV? I'm trying to get to grips with this for gameboot editing. For me, Z33's decoder is not working for me.

*I mean at3 files dumped from pmf files, NOT wav files produced by Goldwave with the at3 codec - there does appear to be a difference.