i just writen "Testing ad management"

In that case there must be a problem with your settings somewhere.

what settings would be that can create problems or that i have missed or something else?

Does this work with Gars?

I don't know, but I would have thought so. You may need to use $GLOBALS[header_advertisement] instead of $header_advertisement etc for the template edits.

i have done template edits as you mentioned but it still did not work! tell me what else should i do? or any thing that you want to know!

You could try posting screenshots of your settings I suppose. :) It's hard to say, there's not a lot that can go wrong really.

I know it's in here somewhere, but I just can't find it. I have the ads showing under the first post in a thread, but I want to show under the first post on each page. Did I manually make a change, or do I have to change the script to do this?

It's one of the default options.

"Display advertisement after first post on a page?
Choose Yes to have advertisements display after the first post on every page."

I do have that clicked yes, but they still only show up after the first post on the first page. I also have yes for after last post, but they do not show there either... Am I missing a template edit somewhere maybe?