Cannot reach Windows 2003 agent

[svinkallt]

Hi all!
I have Zabbix 1.0 server running on Debian and the client on Windows 2003 Server. Everything was running fine until I decided to upgrade 2003 to service pack 1 as well as the other recommended security upgrades from microsoft, but after rebooting the windows server the Zabbix server cannot see the agent. I have tried restarting both server and agent, checked firewall settings on both sides (i can see port 10000 from the server), even reinstalled the agent, but all I get is "unavailable". Did the upgrade break anything or reset some parameter?

I would appreciate any hints or clues.

[svinkallt]

To reply to my own post, I found out what the problem was. For some reason, cksum is "not supported" following the upgrade to SP1. Beats me. But disabling it solved the problem.