Modem Problem in Dell Laptop

I have a Dell Latitude c610 with Win XP Service pack 2

running on it. I have a problem with its modem. Whenever

I boot the system it gives message" a new hard ware

found" and after some time and other message window

appears in task bar '' an error has occurred in

installing the hardware......''. I have downloaded the

recent driver and installed it but problem still exists.

The type of modem is PCTEL 2304 WT V.92 MDC modem.

Please help me to solve this problem.