You ever get this answered?
If you are getting a code #19, you need to upgrade the chip in your computer. Contact JIMF. He will sell you a new chip which included installation instructions. Price is VERY reasonable. His email addr is
jforgione@prodigy.net
As far as other codes go, here is a list from Jim's site:
http://pages.prodigy.net/jforgione/MB_DM.html