Canon BJC-55 Series User Manual page 134

Windows
If you are using the infra-red interface, is there an obstacle
between the printer and the computer?
When you use the infra-red interface for printing, the area between the
printer and the computer must be free of any obstacle which could
interfere with the line-of-sight communication between the computer
and printer. Remove any obstacles.
132 Chapter 6 Troubleshooting