There was some problem sometimes in WaveLab 6, but from WaveLab 7 and a new technology, this kind of problem has almost disappeared. You should really consider a conflict with some other software.
Anyway, install this again, and reboot:
There was some problem sometimes in WaveLab 6, but from WaveLab 7 and a new technology, this kind of problem has almost disappeared. You should really consider a conflict with some other software.
Anyway, install this again, and reboot: