problems installing CA Antivirus Etrust

Hi,

we have a lot of problems installing CA Antivirus using
different install-funktions.
The software will be installad, but after installation
the software will be uninstalled automatically.
We don´t have any idee whats going on.

Does anybody know how to install the software without
an admin-server, only using a batchfile?

Thanks for helping,
Werner