Problem in printing to non-Postscript Designjet 1050c

[Michael]

Hello,

I'm trying to install a HP Designjet 1050c whitout PS-Support in cups (version 1.1.20, Operating System: SLES9).
But I get no output.
I take a closer look at my configuration and found that I was using a ppd-File from HP. This ppd seems to support only PS.
Then I installed a ppd from www.easysw.com, that supports HP-RTL for that Plotter.
But.... still no Output (no Test page, no Printout from Texteditor "kate", lpstat -t reports: No valid software license was found !

Any ideas ?

Thanks
Michael