I started instalation from Automatix and since it asked me for serial key. Since I had'n have serial at that time i pressed cancel and Automatix has got frozen.
I obtained a serial but i can't run installation anymore. When installing from Automatix i get this:

Početna konfiguracija paketa ...
(Reading database ... 166818 files and directories currently installed.)
Unpacking vmware-server (from .../vmware-server_1.0.4-1gutsy2_amd64.deb) ...
dpkg: error processing /var/cache/apt/archives/vmware-server_1.0.4-1gutsy2_amd64.deb (--unpack):
 subprocess pre-installation script returned error exit status 1
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)
And installing vmware from official vmware webpage this:
The following VMware kernel modules have been found on your system that were 
not installed by the VMware Installer.  Please remove them then run this 
installer again.


Execution aborted.
Please help!!!