It looks like you've lost the ghostscript driver for your printer (or it's been moved or renamed).
The easiest way out of this is to delete the printer through YaST, and recreate it.
Note that this will probably delete the pending jobs; you can rescue the .ps files from /var/spool/lp/ (or wherever your printer spool directory is) and then print them again with lpr after reinstalling the printer.
It also looks like the enable command isn't working like you think it is; try specifying the full path to the enable program, eg.
Code:
/usr/bin/enable epson_stylusc66