I have just built up a new computer which has gone really well except for the modem installation. The modem is a Speedcom 56k ISA slot model. The modem is preconfigured for com2, irq3. In setting the modem up I disabled the onboard serial port 2 which is what I have done for every modem I've set up in the past. If it helps the box has this sentence on it "PC-XT slot or Plug n Play(option)". Does this mean the modem is Plug and Play or non plug and play? The first time I booted up after installing I went to the control panel and tried to find the modem under "Modem". On this attempt I received the message that the modem wasnt connected, that basically the computer could not communicate with the modem. After trying this several times and getting the same message I put the modem into another ISA Slot. It didnt work there either, so I tried the third ISA slot and lo and behold it found the modem. I turn the computer off and go back to it an hour later and the modem cannot be communicated with again. Now heres where it gets real weird. I went into the BIOS and changed the 2nd onboard serial port to another i/o range but stayed with IRQ3. Suddenly I find the modem and it stays through reboot after reboot. But, at the same time Win98 installs a com4 as well as a com2. It installs the modem on com2 and nothing on com4!!!. I tried another setting in I/0 range in the bios which didnt work so when I return to the setting that kept the modem in place it wont install. What on earth is going on here?? STARLIGHT WRITER PUBLICATIONS http://www.starpublications.com "I love deadlines. I like the whooshing sound they make as they fly by." The PCBUILD web site always needs good submissions. If you would like to contribute to the website, send any hardware tech tips or hardware reviews to: [log in to unmask]