The unit seems to work fine with my Pentium 133 MHz / Windows 98, ancient notebook. However, it does not workk with my Pentium 4 2GHz machine with 1 GB RAM and Windows XP Pro. Any ideas what I should do? The unit being a serial unit, I thought the computer difference would not make any difference. Regards -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads