Can you post a schematic?
Looks like you have 7 connections from the display to the PIC.
Should be 6.
LCD to PIC
----------
RS (pin 4) to PIC RA4
E (pin 6) to PIC RA5
R/W to GND
D4 to RC0
D5 to RC1
D6 to RC2
D7 to RC3
D8 to RC4
D8 is confusing me