NFS dies after a few minutes using WEP encrypted WLAN

[furanku]

Hi!

Im using a Netgear MA311, a Netgear MA401 and a Netgear FM114P Router. Browsing the net, ssh, printing (except for a problem described in an other thread) works fine. I've enabled WEP encryption. I know it's not very safe, but an unencrypted WLAN elicits too many wardriving script kiddies for my taste.

Just NFS stops working after a few minutes. I think I have read of some firmware updates for the above mentioned WLAN cards, but berfore I try that I'ld like to hear if someone else has an idea what could that be?

Frank