You mentioned that they are compatible with your NIC .. are you hooked up to broadband?
The Audrey has 2 connection options .. Ethernet or dialup. If you have hooked up a usb ethernet adaptor to the Audrey, it is probably not configured to use the modem (or that may be the problem 
)
If you are connected to broadband, you are not to be concerned about the Audrey's internal modem as you would not use it for anything other than caller id. You have a couple of layers of complexity to deal with if you are broadband ..
To see which method Audrey is configured for (and get to the settings)
Action Pallet --> Internet Settings -->Advanced Information
1. If you are connecting straight to the modem through a hub/switch/direct , you will need to configure the tcp/ip settings manually to directly mimic your computer (both cannot be online at the same time) The reason that both have to be set to the same thing is that when you send out a request (assuming it gets past your isp modem), it will return to the wrong place. Your ISP assigned you a single address, the only way to get around that is to use a router which will translate all of your requests into the single ip address that your isp provided going out and the returning incoming packets of information will be routed to the appropriate party that requested it (either your Audrey or pc .. etc).
a) select Use USB
b) unselect use dhcp
b) Insure that the ip, netmask and gateway, primary and secondary dns are the same as your regular computer.
Reboot and should work ..
2. If you want both to be online at the same time, you will need to install a second nic in the pc (assuming you have win nt or better & a pain in the neck) or buy a cheap router (like a linksys befsr4) If you do have a router, enable dhcp on the router, set the Audrey to use DHCP and call it a day ... for most configurations that is ..
There are forums that deal with router setups specifically like the ones over at http://www.dslreports.com
If you are actualling using a modem, try this --
1. Try a different jack in the house.
2. Try it at a neighbor, relative or friends house.
3. Try a different provider (maybe you can logon with a friend's or relative's account)
4. If #1 or #2 work, chances are you have a line quality issue.
5. If #1 and #2 do not work and #3 works, chances are your ISP is incompatible, try an external modem.
6. If #1 and #2 and #3 do not work, chances are good there is something wrong with your hardware, you will need to use an external modem ...
-The poor mans guide to troubleshooting without expensive equipment ..
-Ron
http://www.AudreyMadness.com/
