FSX crashes when dragging windows to side screens.

I recently upgraded my mb/cpu (see system specs) and now when I open a new window in FSX, undock and drag it to one of my side monitors I get this error message:

"Microsoft Flight Simulator has stopped working.
A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available."

Before I upgraded the side views were working fine but of course I had to reinstall Windows7 and all my FSX programs, scenery, etc. Can anyone tell me what could be causing the problem. I really miss my sideviews.

Jerry

SYSTEM SPECS

ASUS P8Z77-V-PRO Motherboard
Intel i7 2700k CPU
COOLER MASTER HYPER 212+ CPU COOLER
Corsair VENGENCE 8GB DDR3
Evga 8800 GT 1024 DDR3
Evga GTX 285 DDR3
Sandisk 240GB SSD
Seagate 500GB SATA II
Seagate 1.5TB SATA II
SoundBlaster X-FI Xtreme Gamer
Cooler Master 1200w PS
Matrox TripleHeadToGo
(3) Samsung 46” HDTVs-Front surround view
ViewSonic 22” LCD-Left view
Aesus 23” LCD-Right view
Windows 7 64-bit
Altec Lansing VS5237 5.1 Surround Sound

Well, I guess I figured out my own problem. I unchecked "Preview DirectX 10 in FSX settings and now I can drag the windows to another screen without any problem.