Digital BW, The Print

I've been trying to get the MIS CFS to work on my Epson 1270 for 
months now!  Every time I have a breakthrough, some new problem crops 
up.  MIS has been terrific with their help and support, but now I 
seem to be at a dead end.  All of the lights are flashing on my 
printer.  The Epson book says that means an 'internal' problem, and 
to contact Epson about it.  I can't imagine that Epson will help 
since I've modified the printer.  Does anyone have any idea what 
could cause this?
Thanks so much,
Bob