RC4 -> RC3 building back?

[vmpr]

the problem is that nothing is working... no vhost ( this i could fix, i have created a new vhost and after this, all the others are working too, all the other domains too... ) but the emailaccounts are not working, nobody can authenticate with the mailserver. i can delete the old one and create them new but that is no solutions... i can`t know if there are other bugs now in the system.
I have installed RC4 and alle worked fine and then i have execed this one:
"/var/www/ispcp/engine/setup/ispcp-setup"
Don`t ask me why ... it was a mistake.
Can`t I rollback this script with another?

Sorry for the bad language... I hope u can understand it...