Hi,
What's your powersupply voltage? You have BOR enabled @4V so anything below that will hold the chip in reset.
Try leaving OSCCON.0 = 0.

Finally, and this doesn't matter in THIS particular case, all define statements are case sensitive and all PBP defines are defined UPPER CASE so it must be define OSC xx or it'll behave as it wasn't even there.

/Henrik.