Just installed a USR 56k Fax Modem in a machine running WindowsXP. All looks fine according to Windows, and the modem clicks as if it is ready to dial. However, I keep getting an error stated there is no dial tone. Only other card in the machine is a Creative 128 sound card. No conflicts in Device Manager. I have moved it to different PCI slots, to no avail. Would it seem that this is a defective modem, or am I missing somthing?