Wireless Problems

[pushVTEC]

I've been having problems keeping my connection to the internet the past few days so I switched to the PCTel roaming client and still no avail. When it does connect it only connects at 1mbps using 802.11b. Which is weird because I have the router set to use only G. Then it depends every 5 minutes or so I'll get disconnected and sometimes it will reconnect to the router and sometimes it wont. Anyone have any ideas why this may be happening? I don't think it could be a weak signal because i've had full signal in my room before but now I can't connect using G. Any ideas or anyone familiar with the PCTel client?