Hi

I don't think i'll be much help but I had similar problems with my netgear a while back and was told to update the router. Something to do with older software on routers and ULL thingy.

I was running XP on all PCs and every so often for no reason i'd lose connection (although nothing changed on screen) I had to resort to turning the router off and on again (technical, i know ;o) ) Then it would be ok for either an hour or a few days.

In the mean time I ended up changing BB suppliers anyway so didnt get round to trying the suggestion. But since i've been using their router I haven't lost connection once. Im thinking it's probably an issue with your router.