atmel problem or usb?

Hello .
I have an wireless network adapter (from Zayetech WU221p) witch is conected 
on my usb port.
 From time to time the system freeze .
I've searched my logs and the only unusual things were:
 - uhci.c: uhci_result_interrupt/bulk() failed with status 440000
 - modprobe: Can't locate module char-major-10-134
I've tryed both drivers at76c503-rfmd and the last atmelwlandriver
I use slackware 8.1 with 2.4.20 kernel but I've tryed 2.4.21 and 2.4.22 with 
the same results: the system just freze after a random period of time.
The motherboard is VIA Apollo MVP3 (vt82c586b)
What sahll I do?
10x.
-- 
Catalin Petcu
Network Administrator
Memorial Data, Caracal, Olt, Romania