Problems with DHCP

I cant get Knoppix working with DHCP on my box any more. It worked on this exact same system just a few days ago.
When i try to run pump manually, all it says it "Operation failed".
I've tried booting into windows and doing a ipconfig /release from there to get all the leases to expire, and then directly booting to Knoppix, but it still dosent seem to get any contact at all with the dhcp server. The eth0 card (dlink-530tx) seems to be detected properly and all the relevant modules seems to be loaded.

I'm running Knoppix from cd and not using any configuration floppy, so i havent made any changes to the system at all.

1- can you configure you network manualy?
2- can you boot your PC with a different OS?
3- do you have network-connection?
4- case 1 or 2 : can you ping your dhcp server or any other pc?

rob

Did you try this:

netcardconfig