I just got a new laptop win xp. Installed Procomm 4.8. Not able to handshake with any of my usrobotics sportster modems. All far end PBX's are set up @ 19200 N81. My old laptop works fine (win xp, procomm 4.8. It must be a setting because it is every usrobotics. I am able to hit my ion modem on the 81 just fine.