momo72:Apple Tech Support are telling me that the Base Station has to be connected (wired) to my internet modem. If that's right, I'm not going to connect to the DM in that case since they're too far away. Major bummer. I hope there is a way for it all to work wirelessly. Isn't it the whole thing of the gizmo? [currently still not working...]
I'd respectfully suggest that Tech Support are talking out of their...Apple (unless they know something about O2 Broadband routers that I don't).
In windows, go to a command prompt (Start/Run, type 'CMD' - you get like a DOS prompt) and type ipconfig, press return, and tell me what the default gateway is.