Check you .lst file.  It probably says something like:

Message[302]: Register in operand not in bank 0.  Ensure that bank bits
are correct.

        My program is full of these things and it gets to be a little
annoying.  If you check the code generated, you will probably see that it
made the right numbers.  It just spits out this warning to highlight
places where you could make a mistake (I saw in your listing that you did
not.
        If you get your serial I/O working, I would be VERY interested in
seeing your code.  I wrote an interrupt based routine that does not
receive.  For a complete listing of my code, see the archive.  You can
search by name (Fred Thompson), or by date (Wed 13 Aug, 1997).

Fred Thompson
fthompso@mail.win.org