A few questions -

What version of Power Tracks are you using and do you have all the up-date patches loaded?

When you go to EDIT-AUDIO EFFECTS do you see the list of available PLUG-INS before you select DIRECT X AUDIO PLUG-INS? If so, can you select one from the list instead of going to DIRECT X AUDIO PLUG-INS?

Does this happen on all tracks of all songs?

This information will help us to work out what's happening here.

ROG.