Sharepoint 2010 - Publish TMG

[MicrosoftTechy]

I am trying to publish our SharePoint 2010 site via our TMG server. We will be using HTTP for this application, however i create the rule for SharePoint and within the web listener enable HTML Form Authentication the proceed to the next page where i select NTLM authentication. When i proceed to the site i get greeted with the TMG FBA site, enter my username and password and it returns with

 

“You do not have the permissions required to access this Web site. Please contact the Web site administrator.”

 

Im thinking the authentication request is not being passed to SharePoint correctly ??

 

Any idea's?

 

Jack