The Edit link for posts does not seem to work.
Thanks for your comment and for your suggested solution.
However, that fact is that the "Edit feature does work".
When you make an edit to a post, the forum application requires that you also make an entry in the "reasons for edit window" at the bottom of the post. (see diagram below)
Another point to note is that all posts are sent back to the backend database before being re-displayed in your browser.
Depending on the load on the server at the time, this sometimes causes a delay of a minute or two.
Thus "the problem" that you have experienced is related to the Forum application design - which is not related to ASP.NET.
Hope this helps