usb printer...Rrrr!

[Ken]

this is the error message I get now when i try to print:

cupsdoprint -P 'epsonprint' -J 'dump.txt' -H 'localhost:631' -U 'root' -o
'copies=1 
multiple-document-handling=seperate-documents-collated-copies 
orientation-requested=3' 
'/root/.kde/tmp-localhost.localdomain/kdeprint_Wa2xOCp' : execution 
failed with message:
client-error-not-possible

Can anybody tell me where my problem could be? I am using CUPS with 
USB epson C60.

thanks