Need help with steering wheel

[andyuk1]

Please can anybody help me.I will try to explain what the problem is.When my wheel is in the centre the car goes over to the right.Tried it on a few car games now and its doing it with all of them.I have gone into control panel>gaming devices and to my wheel.I have the settings to change a few things but not one to allign the wheel. Using a r440saitek wheel under vista.Main game is rfactor.Or do u think my wheel is no good.Any help would be great.thx