We are trying to implement a TLiveTile into our program, but something is going wrong.
No matter what we do, the tile doesn't show up.

We started by installing the developer environment (set up the WindowsSDK, activated side-loading, generated a testing-certificate, installed Metropolis-Agent, set registry keys) - no problems or errors occurred.

We then started to generate a little application with no elements except for a TLiveTile and a TButton. We changed the properties of the Tile to fit our requirements and then ran the top three actions from the right click-menu of the Tile. (instrument – update – deploy)

With XE3, we get an error on deploying – the fallback path in the DeployLiveTile.bat is not the  correct one for us. In XE7, the path seems to be right.
So deploying also runs trough without reporting any errors,  but the LiveTile doesn't show up as expected. 

There are no reports about anything unexpected, so we're desperate.

We're holding out hope of the community giving us the clue where the error can be found or even how it can be fixed.