The latest version of Mosteks Win7 driver (4.2.0.2) appears to be working correctly now. I recommend downloading it from the drivers page and seeing if it solves any problems you might have been having with previous versions. One thing to be aware of regarding the new version is that automatic sync of GL cards has been disabled due to problems it was causing. Mostek is looking for a solution but there are no guarantees since Win7 itself is the root of the problem. Another issue is that the output gain is reversed on the rev. 3 (maybe 1 & 2 also, not tested) 8/24. This will be fixed in the next update.
The 4.1.x.x series does not work properly with the 8/24 so I'd advise deleting it from any driver file version backups to prevent the chance of accidentally installing it.
Let me know how the new version works for you if you would please.
Thanks
