testpage, OOo working but lp doesn't

[Thomas R. Koll]

I'm installing a C8500PS with network and installed CUPS. Testpage, printing from
OOo and GIMP is fine but printing with lp or cupsdoprint doesn't work.
With PS3-error-report enable the printer prints "POSTSCRIPT ERROR: undefined". No error-message in CUPS.

Any clue which package I'm missing? I'm using Debian.

thanks in advance, tom