Plesk vers. 7,5, install problems

[DP_Doom]

Hallo. I tried to install a demo download version of Plesk vers. 7,5 on a win 2003 server, coz i heard good of it, but I get the following error when i try to install. (Click on the link to see the error.)
http://www.death-platoon.dk/plesk/plesk.jpg
Are there anyone that can help me with this problem. DP_Doom