This is somtimes typical of wireless connections, they can come and go. Is that a good answer or what?

Anyways, what protocols are you running? ie. WEP, WPA somthing like that. Somtimes these can impcat performance. What kind of location is this, an apartment building, crowded neighborhood, country road in the middle of nowhere? I ask because I'm think interference may be an issue for you.

What you can try is a program called Netstumbler. Run it on a computer with a wireless card (preferably a laptop so you can walk with it). The program will tell you if there are any other wireless networks around that are on the same channel as yours (very bad). Threre is a link below for the program.

http://www.netstumbler.com/downloads...ller_0_4_0.exe

Other causes of interference include leaky microwaves, 2.4GHz cordless phones, some cell phones, bluetooth devices, and potentailly any wireless devices close by.