sprocket

I have just installed X-Plane 10 global ed. 32 bit on a toshiba laptop Satellite I7 with Saitek yoke, pedals & throttle and when taxiing or flying, the plane vears to the left continually. In the settings the yoke gives all the right indications for roll and pitch. I removed the peddles to allow the s/ware to do their work but the problem still appears. Usually use cessna 172 but tried another with the same result. Never had this problem in FSX.