Dear all

I am trying to install Zimbra 8.0.0 on Ubuntu Server 12 amd64 but I am receiving an strange error. Here is what I can see in monitor:

Removing /opt/zimbra
Removing zimbra crontab entry..done.
cleaning up zimbra init script...done.
cleaning up /etc/ld.so.conf...done.
cleaning up /etc/security/limits.conf...done.

Finished removing Zimbra Collaboration Server.

Installing packages

zimbra-core......zimbra-core_8.0.0.GA.5434.UBUNTU12.64_amd.deb...FAILED
###ERROR###

zimbra-core_8.0.0.GA.5434.UBUNTU12.64_amd.deb installation failed

Installation cancelled
Does anybody know what is this error and how shall I fix it?

Thank you