Problems with nforce3 nic

Hi, I recently bought SN85G4 shuttle which has small mobo with nforce3 on it. Integrated audio and nic.
audio works fine and nic gots regonized but doesnt work very well, link falls every now and then and whines about irq being lost and its totally unusable. Linux kernel version iam using is 2.6.7 It would be very critical to get this driver working because shuttle mobo has just one pci slot :-p (=one extra nic).
Is this known issue or do you want some debug info?

Markus Kovero