Characters won't stop moving right!!

                I'm having a problem when I start previewing the game I made on RPG XP and on RPG 2000.  My character won't stop moving right on the screen.  i can moov him down and up but not left and he constantly goes right.  I don't understand why it is happening on 2 different games.  Help PLZ!!!

If all else fails, back-up all your projects and re-install RMXP and/or RM2k :\

In RMXP you can press F1 while playtesting the game and configure the controls. You could possibly try that.

Does this problem occur with any other games or software?

If all else fails, scan your computer for trojans/viruses.