Zebra printer not printing

Hi,

I am printing a transfer order using transaction LT31, then a spool request is created.

I go into SP02 and choose "print directly", and the spool request goes into status "Processing".

Then, the request goes into "Print" and finishes...but no labels are printed from my newly installed Zebra Printer...

Is there anyone that knows any trouble-shooting checklist I should try? Does anyone know what the most common problems are for labels not being printed?

Thanks,

Lars Tornblom