Strange pulling to left

[<bw@spottedantelope.com>]

I'm having a problem that just started in my L-39za last night in FS2002. When I apply full throttle for takeoff, my plane pulls strongly to the left, almost as though I had applied left braking. However, the rudder is centered and the brakes are not applied. I even turned on the braking messages on-screen, and no brake message lights when this happens. I tried tapping my toe-brakes (on my CH Pro Pedals USB) to no effect. Does anyone have any idea why this might be happening?
thanks,
Bill Womack

[sky high]

Sounds like FS2002 wind