lcd hd44780 type help - problem in programming

lcd hd44780 type help

hey guyz i'm having a problem in programming an LCD
my LCD is LM052L it has a built in LSI HD44780 and i'm using a pic16f877a i don't know what's the problem.

this is my picbasic program:

Device=16F877A
XTAL=4
ALL_DIGITAL=true

TRISC=0

LCD_DTPIN=PORTC.0 'CALL ASSIGNED ADDRESS TO PORTC.0
LCD_RSPIN=PORTC.4
LCD_ENPIN=PORTC.5
LCD_INTERFACE=4 '4 BITS
LCD_LINES=2 '2 LINES
LCD_TYPE=0 '0 = ALPHANUMERIC ; 1 = GRAPHICAL

DelayMS 500 'PAUSE

main:

Cls 'CLEAR SCREEN
Print At 1,1," MCU DESIGN " 'DISPLAY MCU DESIGN MAXIMUM 20 CHARACTERS
Print At 2,1," test " 'DISPLAY test

End

This isn't my real program because i'm working on a digital thermostat which shows its output at the LCD. but first i'm trying to0 figure out how to run the LCD so this is just a test program. hope you can help me.

My test schematic circuit is uploaded here:
the filename is schematic_lcd


i dont know if the problem lies in the program or in the schematic.[/img]

have u defined the pocessor speed correctly in the properties of 16f877A? ie 4MHz according to code.

zip file attached..containing all related materials