I always put these reminder comments in my code when attempting to program to my EASYPIC6. Are you sure you have the switch settings correct on your EASYPIC6 according to these instructions?

' * NOTES for use with EasyPic6 development board:
'For use with COG 2x16 LCD:
' - Turn on Port Expander switches SW6.1, SW6.2, SW6.3, SW6.4 and SW6.5.
' - Turn on COG LCD 2x16 switches SW10.1, SW10.2, SW10.3, SW10.4, SW10.5
' and SW10.6.