I would check dmesg and see if the drivers for the parallel port are loading. It may be that you have both problems. 1; parallel port not enabled, 2; no driver for the printer.
It should look something like this:
parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,EPP]
parport0: irq 7 detected
lp0: using parport0 (polling).
Yours may vary a bit though. There are different options for the port. Command for that:
dmesg | grep parport
If that doesn't say anything, just type in dmesg and look through it to see if it is there as something else.
Post back what you find out.