PicBasicPro with PICDem2 Plus

[DelBoy]

Is there anyone able to guide me (the poor novice) through a problem i have using PicBasic Pro and the LCD Display on a PICDEM 2 PLUS development board.
I am just trying to display a simple message, like "hello."
I think i have correctly DEFINEd all of the various port values that correspond to the way the display is connected to the p18F452. The data bits are RD0-RD3 and the control bits RA1-RA3.
If there are any other components in the program, ie. then these work as expected. I have tried many combinations of writing this short program, but the screen still remains blank. The display works fine when programmed using MPLAB assembly code.
I'd be most grateful for any assistance.
Thanks
I've attached the code for anyone who may be interested.