UA-25EX Dropping Out

I recently had my laptop upgraded to a 64 Bit Sony Vaio with Windows 7. This machine has heaps of grunt and I expected great things out of my UA-25EX run by Sonar 8.5 LE. Before this I had a lesser spec ACER running XP but this only dropped out occasionally while the new beast drops out all the time. Very frustrating. I have reinstalled the Driver. no good! Adjusted the Power settings as recommended ( havent adjusted the Buffer though).
 
Are there any Driver patches that will overcome this, is this a feature of the LE 8.5 (is it a toy and will I overcome this if I upgrade?) Or is there something else that I can do.