PIC to LCD interface

Hi,
Anyone know how to interface a 4x20 DMC20481 backlite LCD to a PIC16F84?
I have tried almost everything... here is my code below, anyone see anything wrong?

org 0x00
goto start

start

movlw 0x00
tris PORTB

movlw 0x00
movwf PORTB

call Delay_5ms ; 5ms delay
call Delay_5ms
call Delay_5ms
call Delay_5ms

call LCD_Init

;------------------------------------------

LCD_Init

movlw 0x33 ; function set
movwf DispTemp
call LCD_Cmd

movlw 0x32 ; now in 4-bit mode
movwf DispTemp
call LCD_Cmd

movlw 0x28
movwf DispTemp ; sending 2 lines (2x40) 5x7 chars
call LCD_Cmd

movlw 0x08 ; display off
movwf DispTemp
call LCD_Cmd

movlw 0x01 ; cls
movwf DispTemp
call LCD_Cmd

movlw 0x06 ; entry mode shift lcd left
movwf DispTemp
call LCD_Cmd

movlw 0x0F ; display on, cursor/blink on
movwf DispTemp
call LCD_Cmd

call Delay_5ms
call Delay_5ms
call Delay_5ms

return
;------------------------------------------
LCD_Cmd
swapf DispTemp,0
andlw b'00001111'
movwf PORTB
bsf PORTB,7
call Delay_5ms
bcf PORTB,7
call Delay_5ms

movfw DispTemp
andlw b'00001111'
movwf PORTB
bsf PORTB,7
call Delay_5ms
bcf PORTB,7
call Delay_5ms

return