I think have problem in Linux vServer
(most likely nobody created a linux-headers for that Linux-VServer kernel package)
and when i tried to install script i get
E: Couldn't find package linux-headers-2.6.33.2-vs2.3.0.36.30.4-netcup
installing kernel headers for a 2.6.32/33 kernel should provide the required files..But as far as i learned i can't change or update kernel files for vServer. I wrote support mails however their answers quite far then to be good.