Ok, i've done a lot of tests trying to make it run
- Imported the #__booking_config manualy. After that it wasn't possible to save the confing, too - but since that action i be able to uninstall the component ;) So i've done that, built in the sql-table-code for #__booking_config into the sql-installation-script and
- Install once again and once again and... The table iis created by the installation-Script but same situation as before: it's not possible to save the config page - f*ck*n b*llsh*t :(. so after that i take a look at the database: table #__booking_config is there, but no values are in there. well, something went absolutly wrong. And there is nothing in the errorlog and nothing in the debug messages...
Hope you've got an idea how to solve...