REX, Weather engine and avoidance tool issues

I have just bought and installed REX 2.0 and REX OverDrive_FSX_20101027. I'm using FSX Gold Edition with Acceleration & SDK. W7 64bit. i7 and 6gb RAM.
When I start REX 2.0, load a plan and FSX opens,
When I start REX 2.0, load a plan and FSX opens,