Selecting the correct Printer Driver
A printer may not print for various reasons. One common cause for the printer not printing is that the driver for your printer is not selected at the time of printing. In most cases, if your printer is set as the default printer, then whenever you go to print, it should already be selected. It's good to verify at the time of printing.
At the time of printing (in many applications using [File] then [Print] or something similar) the desired printer can be selected. Confirm the correct printer is highlighted/selected and continue to print. Check the application's documentation for specific instructions.