INTOUCH, The perhaps reason is Win98 has some bug and the server pack version is not suitable. Win2000 can find a lot of hardware so it can quickly support AB KF2. You can try the following method to resolve it: 1. Use RSLinx DDE software (OEM version) from Allen Bradley company, it is about RMB 6000, it is typical communication software, it can replace I/O server software. 2. Continue to use I/O server software, but you need to find the old communivation software like AB 6200 or APS, copy a part of driver software which support the AB Card. The file name is same as the hardware, like abkf*.*. etc.