how do I use this php redirect on my pages?

Well,I just think it is odd to be taken to the comments.php -away from the enlighten page

If they're supposed to be able to access the comments page, I think that's fairly normal-- they submit a comment and go to the comments page.

It sounds like this might just be a little too complicated with this script. There are so many comment scripts out there, you can probably find one that integrates better. This one is generally working, though, so maybe it's ok for now?

You can certainly try the redirect methods you had before, but I'm not sure they'd be 100% reliable, at least without modifying the form a bit to track where the user is coming from.

Okay,I will start to look for a replacement script Daniel-thanks for your help