Help - Admin Page Issue (New Install)

Hi,
I recently installed Zen Cart through VentraIP hosting in Australia (Linux server).

After running zc_install I am unable to access the admin page. The following error is displayed:

Fatal error: Cannot redeclare class cache in /home/soldierg/public_html/includes/classes/cache.php on line 215

I have contacted my host however they are unable to provide any further assistance.

If anyone can assist, it would be greatly appreciated.

Regards,
Matthew