After examining through open-e support there is a problem with "mtx" and "loaderinfo" (linux-tools) for handling auto-loaders.
As i understand the problem, one of the tools gets the correct information from the autoloader (Quantum Super Loader 3) that there is a barcode-reader available, but the other tool will receive the information, that no barcode-reader is available. So the option "Label with Barcodes" will not be shown in the gui.

Open-e is currently working on this problem. I think this problem will affect more people that use a "Quantum Super Loader 3".

I am currently waiting for a workaround (updated linux-tools with work correct together or a manually setting on the fileserver through the open-e support). I will post here again what the solution will be.