Well, all that is telling you is that it is not posing a problem. Not only that, I've never heard of an irq conflict eliminating drivers, because if it got rid of drivers, there would be no conflict.
I had a problem with my ISA modem. It was detected in device manager, but wouldnt dial. this was on my kt7a-raid, just so you know.
First go into your bios and make sure that your bios says that your irq for the modem is 5. if that agrees, then go to the place in your bios that gives you the choice to manually configure your irq's and make sure that options is enabled. Then go into your irq selection (in bios) and click on irq 5 and change that from ISA TO LEGACY ISA.
I'm not saying this will work for you (if I was even kinda clear) but after trying everything on mine, somebody on this forum walked me through this and that was the problem. I would never have figured that I would have to change irq my modem was on from ISA TO LEGACY ISA. And from the best of my understanding, it wasnt a mobo thing, it was a win 2k thing.
Good Luck