Got working by adding the -M <Folder> to the end of the configuration, first i added the arg at start.
Info (from my iPad Spotify premium) now looks:
[root@z1 shairport]# tail now_playing
artist=London Grammar
title=Strong
album=If You Wait
artwork=cover-6bb7f637c001a61f73e9c7beec787ce9.jpg
genre=
comment=
I ordered a 3.2" TFT for 10EUR in china, think it will arrive in Februar

Then i want to push the cover and infos to the TFT.
How to transfer this infos to the web interface?