A few weeks back I had a problem with my two 3c905B cards. The problem was actually RedHat 5.1 related, and it got solved by installing net-tools v1.46. It's funny v1.45 worked well on a computer with two cards using different modules. So, sorry about bugging you, and thanks. If someone runs into the same problem, tell him/her to update the net-tools. -Antti