Really not a good idea to publish login credentials in a public forum… but… as you provided no url to your site or forum, page I guess it doesn’t really matter

If by ‘transferred to a new server’ you literally mean just that then there is clearly something else amiss. So was there anything else involved in this transfer? Same domain name? Straightforward db export/import?

But – go to the forum admin > toolbox > housekeeping and try re-indexing your forums one by one. See if that helps.

forgot to post the url this is temporary account.

I did the housekeeping re-indexing it worked for the forums that was showing 0 topics and posts, it now shows the numbers but for the one that was showing the number of topics and posts still says “The requested forum does not exist”

The transfere was to a different server with the same domain name. File transfer was done via ftp I compressed the wp content files and download to my computer and transferred by ftp. I backup the database from cpanel backup wizard then restored it on the new server again with cpanel backup wizard

http://internetcoachingschool.com/forum/

I will need a better example… I clicked on 8 forums and topics and all loaded fine…

but you will have some issues since you are using a very dated wp theme…  it is loading an ancient version of jquery directly:

<script type=”text/javascript” src=”http://internetcoachingschool.com/wp-content/themes/school/slider/jquery-1.4.2.min.js”></script>

which is then causing some site js errors because that old version conflicts with the current version loaded by WP…  themes really need to load the WP version not their own…

see:  http://codex.simple-press.com/codex/faq/troubleshooting/what-is-this-jquery-conflict/