cannot login via ssh after installation

[sone]

hello!

i'm in trouble! i have no idea anymore how to solve the problem - but i can login to the server with a repair-system... i would be really happy if someone could give me a hint why the server is not booting correctly, or which files i could/should edit to solve the problem!

i've installed ISPConfig after I had installed debian sarge. i used this perfect installation instructions. everything was working fine...
but after i did a restart of my vps i'm not able to log in via ssh anymore

the server is starting and the last thing i'm able to do is to write the password.
the last thing the server is telling me:
"System bootup in progress - please wait"

afterwards nothing happens anymore... it's not possible to ping the server...

i thought that maybe it's a quota related problem... because the only step i did not managed to do was to end the instructions related to quoata:

quotacheck -avugm
quotaon -avug

i was thinking (have to stop this...) that i could do it after finishing the installation, because i'm on a VPS where i'm not able to use "mount" while running the server - if i have to do everything again i know now i have to reboot instead...

besides of that, i installed the Courier-IMAP/Courier-POP3 first, and then i removed "courier-imap courier-imap-ssl courier-pop courier-pop-ssl" again, and i repeated the instructions "Postfix/POP3/IMAP" .... after doing "ehlo localhost" everything seems to be fine...

looking foreward...

sone