fresh install - can't access admin control panel

Trying to do a fresh install of imscp 1.2.0, the installer completes successfully but when I try browse to the web interface I get a directory listings, restarting apache doesn't appear to fix the issue, appreciate any help on this, thanks.

Hi, I've read that, anything in particular I should be looking for? It seems that it's missing a file (or few) or maybe I've got a step wrong in the installer somewhere? It's a completely new install, not updating from a previous version.

At the moment just trying to go the server's LAN IP (xxx.xxx.x.x), on previous set ups we've done this it normally works, currently in the process of completely uninstalling it then re-install so will see if it works after that