I have been using COM3 --> IRQ2 and COM4-->IRQ5 for about 10 years now with the same multi port card in I think 6 different PC's now with ZERO problems. Try those IRQ's. -- Submissions: ct-user@contesting.com Administrative requests: ct-user-REQUEST@contesting.com WWW: http://www.k1ea.com/ Questions: owner-ct-user@contesting.com