ok well one of those places, is not set up correctly (with the drivers)
Now you have run a lot of software tools, and we are close to finding the driver
But, if you actually remove the card, and read any numbers\letters printed on it, we could make absolute certain (instead of try this and try that)
Many PCI Modems are difficult to locate the correct drivers for them
But eventually they're found.
Or you could just leave it, and not use the local phone line in your compuer
Actually because it may be an addon card (aftermarket lets say)
You don't happen to have the install CD do you?