In addition to the post above linking to the index.php file edit required if you are running either vBAdvanced CMPS or vB CMS; here is a link to the cached page on v3arcade.com for some solutions to common errors/problems
http://webcache.googleusercontent.co...&ct=clnk&gl=uk
It may help until the site merger is complete
And if you need anything else, you'll just need to ask me