Cannot create TFS Project Sharepoint Site after WSS 3.0 Upgrade

In my Test Environment, after upgrading to TFS 2008 and WSS 2.0 to WSS 3.0 an issue raised.
No team project could be created. I was pretty sure that the problem resided in the TFS - WSS mappings.

WSS 3.0 upgrade gets configured by default using the TFS server name (NETBIOS name MyTestTFS in my case). Many test environments use the NETBIOS name and this is something to take into account if you plan to move it into production in some point.

Here's the deal. I first created the complete update command for Sharepoint knowing that just the Admin site needs to be changed…but just in case:

TFSAdminUtil configureconnections /SharepointURI:http://MyTestTFS.csystems.com.ar:80 /SharepointSitesUri:http://MyTestTFS.csystems.com.ar:80/sites /SharepointAdminUri:http://MyTestTFS.csystems.com.ar:17013 /SharepointUnc:\\MyTestTFS.csystems.com.ar\sites

Nothing fixed at this point and now unable to create the Project Sharepoint site when creating the Team Project. A different error raised.
So I went to the WSS Local Administration site and checked the mapped sites to find that http://mytesttfs.csystems.com.ar/ was not there. So I added it as alternate internal URL.

EVERYTHING WORKS ! Now TFS and Sharepoint are correctly mapped allowing Team Projects creation using the TFS Server frinendly name.