There should be two straight graphs instruments on the flight panel -
one vertical, the other being horizontal, and each representing the
range of positions of your rudder (the horizontal one) and the
elevators (I forget which, oh - the vertical one!! ) A needle on
each graph indicates the position of that control surface. If the
needles are jumping around like crazy even when you're not doing
anything, odds are that it's a problem with your controllers. Even so,
I'd be surprised if that were the case, since controller problems
shouldn't be restricted to a single program. Have you tried it on any
other programs? What happens in the XP Control Panel window for
controllers?