Help with Video Script

I have installed this script here http://www.google.com?t=6015197&highlight= the home page loads fine but when i click on any other links like the login or admincp it goes blank but if i add .php at the end of url it will open the page. Any ideas on how to fix this. TIA
Answer #1
you need apachea2e mod for the permalinks to work.just read the instructions,it tells you.
I already have 4,000 videos on my site
Answer #2
Dont say anything in the instructions about any mods but where can i find that mod at. Thanks for the help