my app.confg looks like this:

-->

i have an existing site, the forum is in the forum folder, moved all the config files and bin and evberything else to the site root

when i click on any link the url looks like this:

http://localhost:333/Forum/yaf_search.aspx

or whatever page its requested on the end of there and the 404 error:

The resource cannot be found.

Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.

Requested URL: /Forum/Forum.aspx

not sure what ive done wrong please help?!

I am facing same problem . could you please help me with more details ?

This link will help  walk you through the necessary steps.