Modem Woes

Hello, all you helpful ones, I am having trouble with a modem of the Intel 536ep chipset. It worked perfectly with 8.2, but with 9.0 a strange problem has arisen. It dials fine, but a few seconds afterward (during the high pitched wailing) it disconnects and dials again. This time, it disconnects after only dialing the first for or five digits. It then clicks on and off, on and off, on and off, until I stop it. The telephone then rings; when I pick it up, there is nothing but a high pitched note. The modem still works good in Windo$ (I am the troublesome one there) so I don't think it could be a problem with the hardware. Has anyone else had a problem like this? I would love some help. Matthew Marshall