Riddle me this, Batman: Howbeit that others have been using M-Audio with PowerTracks and I've experienced crashes for quite some time? Since I will be asked for these details I'll supply them now:

I'm using PowerTracks 12 on a machine with a 3 gig processor, 4 gig of RAM, two 2TB hard drives that are 10 times faster than the Raptor I first installed, running Windows XP SP3 with two Delta 1010s using the 5074 driver. I've tried it with and without selection of "disable asio direct monitoring." I've also tried the ASIO4all, but it didn't help. The wordclocks are locked via BNC connector. I've tried using the first as the source or slaving it to an external spdif at 44100. I'm using a 256 sample buffer (but I've adjusted this to no avail) at 44100 (variations to this were also attempted). This computer is for recording only, so there's no internet, no virus protection, etc.

I've also used PT11 with only XP SP2, a single Delta 1010, single and multiple 1010LTs, and the two previous M-Audio drivers. Currently, a friend of mine is also experiencing this problem running PT11 with two 1010LTs and the same M-Audio driver.

The actual problem:
During playback of seq or wav files PowerTracks crashes, apparently, only when I hit "stop," either by keyboard or mouse. It may be the first time or I may be able to start and stop playback a dozen times, but it always crashes. At that point I can ignore the crash message, save the file and even do another playback, but there's no audio. Only the MIDI continues to work.

What's not a problem:
I've been able to work on MIDI only sessions for many hours without incident. The audio works fine with Windows Media Player, Cool Edit Pro and various DVD players. I am also able to use the motherboard's sound with an MME driver, but I need to multitrack.

Obviously, I've tried to include everything I know. No doubt, it is what I do not know that is causing the problem.

I am thankful for all the highly experienced people who are able and willing to help me with this issue.