Without more info about your System it's difficult to offer much help. Your reference to "jumpers" suggests an oldish setup.
Confirm that the printer is connected logically to LPT1 by right clicking on the printer in Start/Settings/Printers and then clicking on Properties/Ports. If its not connected logically put a tick in the box for LPT1.
If that doesn't work, come back with details of which version of Windows, make of printer and I/O card with the jumpers.