Airport Dual Ethernet connecting to DSL.

My normal system is a Windows XP PC connected to 2wire dsl router from SBC. My wife has an iBook(the white one)that we are trying to get connected to the internet using an Airport Dual ethernet. THe iBook has a wireless card installed and before I moved all I did was plug the airport into the DSL router and all was well. Now what is happening is that as soon as I plug the airport into the router it I lose my PC internet connection, even more frustrating is that I still can't access the interent via the iBook.
I am totally unfamiliar with the Mac OS so this just adds to my frustration. Are there any resources/guidance/books that would help a new wireless Mac user on configuring the airport to connect to the same router as a windows PC without screwing it all up?
Any help would be awesome.
Jamie
PC   Windows XP Pro   Airport Dual Ethernet

Hello, I'm new to Mac's as well, but I hope I can help narrow down the source of the problem a little.
You said "and before I moved all I did was". I take that to mean you moved from one home to another. Does that mean that you also have a new DSL service provider (which means they provided you with the DSL router you are using. A couple things to try to semi isolate the problem, or at least try to narrow it down to one device having issues.
Try to connect to the internet with each computer individually using the DSL router, one at a time. Do they both work that way?
Try connecting the airport only, then connecting to the internet with each computer individually (the other should be powered down so it doesn't try to connect when wireless becomes available {hopefully}). Do they work this way?
If they work, or one does but not the other you have provided yourself wirh a wealth of information to offer the experts (no that's not me), I'm afraid I won't be much help beyond this. The reason for this method is that you may discover that something has happened to your system(s) (hopefully not) during your move(?), or your service provider (new) may have provided you with a faulty router (just a couple of possibilities).
Another thing, have you installed any new software, or updates recently, like just before the connection stopped working.
Hope this helps.

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