Canon BJC 3000 Reference Manual page 266

Check 7
Is a WPS driver installed?
You may not be able to print correctly if a WPS (Windows Printing System)
driver is installed in your computer.
1
Click Start, point to Settings, and click Printers.
2
If a WPS driver is installed, right-click the icon and then select Properties
from the pop-up menu.
3
Click the Details tab and check the "Print to the following port" setting.
If the selected port is the port also used by the BJC-3000, change the WPS
driver port setting to FILE or delete the WPS driver.
Error writing to LPT1 or USBPRN
Troubleshooting - An Error Message Appears 266