Log into the server having issues, don't go to the menu of the server (like ros_menu) just log in as super user (su)

Then:

• lpstat -t
• Find the printer with all the stacked up jobs:

• You can either cancel all the jobs 
  • cancel -a "printername" (exp wndistrcrtrm)

or you can cancel a single job if there is a large job seemingly causing the problem

• cancel "printerjob"  (exp wndistrcrtrm-301667)
• After you delete all or some of the jobs causing the problem, the printer needs to be 'enabled' again.

/usr/sbin/cupsenable "printername" (exp wndistrcrtrm)

If you do a new lpstat -t the jobs should start coming off the list