It looks as it starts with the e1000 nic card

Have you tried moving your nic to another slot ?

You may want to try modifying the drivers for the nic
I had some network issues before and made some changes, it has helped
http://kb.open-e.com/entry/116/
you will need to read the link to the intel page and make the apporate changes to match your setup

check the logs to see what is going on with the nics,