Off the top of my pointy head, sounds like you have an irq conflict... Use MSD to examine your com/irq combinations and correct as necessary.... Denny -- FAQ on WWW: http://www.contesting.com/trlogfaq.html Submissions: trlog@contesting.com Administrative requests: trlog-REQUEST@contesting.com Problems: owner-trlog@contesting.com Feature Wishlist: http://web.jzap.com/n6tr/trwish.html