Wireless connections intermittent

I am using a laptop with windows xp pro and connect to my wireless g network using the integrated Intel Pro/wireless 2200bg. It’s been working flawlessly for over a year now, and now recently the connection has become intermittent. my other computers which also use the wlan dont have this problem. I’ve been trying a few things i can think of like upgrading the laptop’s drivers but need a few more ideas of what could be the cause.

I use a linksys WRT54GS configured with a 64bit WEP key for security.

Any ideas would be greatly appreciated.
Thanks