HP Laserjet 4000n - can not print to A5 tray
I have just bought a new addition to our printer, a new tray unit so I can print A5 paper, but for some reason, no matter how many times I install the drivers or tweak and reset the settings I can not get the thing to print on the A5 paper. I do not have a manual and have had to search online for anything related to it and found a lot of other people having similar problems like me.
I have tried to make the tray 1 which seems to always be default ( the manual feed) then trying to print A5 after changing the print options in word I still get message on printer to add paper to tray 1 !!
Can anyone suggest what else I can do ?