Help - ImageWriter II pin firing

[mcfudge@wbb.com]

I am trying to make my IW II fire the third pin down from the top
without having to fire any other pins at the same time.  The code
to print a bit pattern is ESC G nnnn {data}.  For example, if I
wanted to print the capital letter Y, I would send the following
information:

PRINT CHR$(27)"G0001"CHR$(3)CHR$(4)CHR$(120)CHR$(4)CHR$(3)

However, the CHR$(4) is also the CTRL-D command.  Even though,
according to my documentation, CHR$(4) would cause the 3rd pin to
fire, I keep getting an error message.  The syntax is okay, it's
probably just the coincidence of it also being the DOS call
character, CTRL-D.  Sending CHR$(132) doesn't work either.
Surely software that dumps a hardcopy of the hires screen has
come accross this quirk, and a solution has long since been found.

Has anyone got an idea of how to get by this problem?

Myles