your report has something strange.
If you can assign modules, you must be logged in as admin, which means you shouldn't see some "Permission denied you can not view this page"
...and you should see the admin menu!
The best thing to do might be to check a movie from TikiMovies to be sure you don't miss something about the interface which is admittedly not the simplest one.
In all cases, if accessing #tikiwiki with ConnectingtoIrc is posible for you, there are good chances you'll get an answer faster.