Lost connection

Windows 2000-p
I have a linksys router WRT54GS - V6.0 (using 2 ethernet ports and one wireless)
Linksys compact usb adapter wusb54GC v 1.2
netgear printer server WGP5606 USB
dell printer server adapter 3300

My problem is (and linksys has not been able to find a solution), the usb adapter continually loses signal and i get an error that states "cannot associate with access port". when we go to reconnect, it flashes really (and i mean really) quickly like going to connect and then get above error. Takes many times to get back up again if at all.

Things i have done, have tried on WPA and WEP security and no security. (currently on WPA-personal security). I have turned off wireless printers thinking there was some hardware signal conflicts or something and still lose connection.

I know many people who use a lot of wireless technology and this should work, but there must be a conflict somewhere.

Anyone have any suggestions