Did it work before? What was the setup before?
Also, read http://forums.cnet.com/7723-7585_102-580396/wireless-network-advice-needed/?tag=rb_content;contentMain where you discover that new does not mean bug free. I think this sounds like a new router bug (or a repeat of the one I noted.)
I'm pretty noob at this so this may be something really simple... I hope so.
I have a just installed a new WiFi router (Asus WL-500g) which is connected to my broadband modem and to my PC (XP SP3) and now whenever I try to download anything I lose my internet connection. The network connection still shows as being active but I cant load web pages or send e-mail. It also happens if I try to stream video so i t seems like it is becoming over loaded.
The only thing that solves it is a reboot of my PC.
Anybody got any ideas what might be causing this?