I had the same problem last year. The timer can talk to the Computer, but the Computer can't talk to the Timer or any other device for that matter. Scoreboards included. I think you have a couple of issues here. I'm sure some of the computer experts can offer more, but here are my observations. 1. Windows 98 and USB don't always get along. (Most people will advise you to get off the Win98 platform for many reasons. I 2nd that motion) 2. As others have said, the best solution to the Serial issue is the get a PCMCIA card for your computer. About $150 for a single, $199 for a dual serial port card. (Not sure you want to spend that much money on an old computer, but even if you buy a new one you will still need the card.) 3. I had good luck with the same issue on my computer (Compaq Presario 2500 with WinXP SP2) and a 605 by changing the Port settings for the Com port I was working with. The Tag manual specifies using Xon - Xoff for the Flow Control settings. My USB - Serial adapter defaulted to a setting of "None". I changed the setting, restarted and it worked. Maybe I just got lucky. The Flow control settings are in Device Manager. You'll have to go to the properties for the port you are using and then the Port Settings tab and down to Flow Control. There should be three settings. None, Hardware and Xon-Xoff. This is for Win2K or XP. Haven't used Win98 in so long I can't help you further than telling you to go to Control Panel, System and then finding Device Mangler, (oops, I mean Manager) Good Luck!