Ok, so I've been beating my head against this one today ...
I wanted to create a portal page for the users here, as simple as possible.
So I created a new page, and added the "Service Catalogue" component
Set my Default Category to the new one I created earlier with my forms in it.
this isnt a problem, it shows up nicely and the user can click on them.
BUT the new window that pops up will NOT automatically log on, and the URL is missing the EnsembleID !
Change the WebPart to the ServiceCataloge Featured Web part - and all is good - the windows pop up properly and work as intended...
Before anyone asks, yes, my service Cataloge Forms have the "EnsembleID" checkbox ticked.
Cheers