Error loading font.

[tmcmanamey]

I'm trying to load a font onto my printer using a C program. I have a postscript font file and I'm reading it through my program and sending it to the printer. I get an error from my printer:
ERROR: undefined
OFFENDING COMMAND: =
STACK:

dicttype

I've checked the file and there is no '=' in the file. Do I need to issue a certain command to send the font to the printer? I kinda get the impression it wants to know which dictionary to load into?

Thanks
T-man