I have this same mobo with a promise tx2 PATA controller. I've got 2 drives hooked up. 1 Parity and 1 Data.
I installed the 3.0 release then copied the 3.1 beta2 over it and the network was working, however I was having other problems like my transfers would copy at 30MB/s then drop to 0 MB/s and back and forth.. So I reinstalled 3.0 then copied 3.1 onto it. Now my network never works..
Is yours still working ok?