Need Help with Broadcom and/or Wireless Router

I have a 2.21 ghz 3400+ gateway equipped with a broadcom 802.11g wireless network adapter...also i have a 768kbs adsl connection coming through from a actiontec gt704wg wireless router...currently i am connected with two-three bars and works fine when web surfing and downloading via bittorrent

But the problem is that after an hour or two the connection is always lost and it reconnects manually quite easily ...but i need a stable connection so that i can download via bitcomet for long periods of time

P.S. router has dhcp enabled, upnp is also on, for my wireless adapter it is set at default roaming settings, 54g auto, and the radio is enabled, while the the power save is off. 8)

Currently it's set at 24 hours...I used ipconfig/all and the wireless lease expires 24 hours from when i reconnect, but i usually leave it on all day and it downloads fine wit

sorry for the double post, but also this computer tends to "physically dump memory" thus restarting my computer...could idling be the problem or just the memory be bad (running 29 processes @ 380MB of memory used)