realtek8139

hi, I used to install suse61 by nfs throuh 2 realtek8139 network cards, by it doesn't work with suse72, it's very slow and crashes Yast in the end. It makes no difference I use 8139too or rtl8139 modules, transfer rate is 15 UDP pachet/sec (was up to 1000 packets/sec for suse61). I thought problem was with 8139too, known for problems with nfs, but same with rtl8139. Thanks for your help if you have an idea! marquis