Patricia:

I admire your optimism and persistence. This thread was started 3 years and 3 months ago.

I can add that I have a client who got a new computer last week and couldn't print to the shared Kyocera (same error "Invalid printer specified"). What was interesting is that he said he could print to that printer with his previous computer and even now, other users could print to the printer. From that I infer that a newer Kyocera driver is the source of the problem.