LCD interfacing with PIC16f877

hi all, i m trying to display some text on LCD using pic16f877 but
unable to get that.......... only backlight turns on in LCD
 circuit diagram i have made is as follows:
pin 1 of pic to reset button( i hav conncted reset button through pull
up resistance of 9.7k n it is at +5v when reset button is not
pressed.)
8 MHz crystal with 22pf cap on 13 n 14 pin
12 n 31 pin ground
11 n 32 pin to +5 V
pin 27 t0 30 connected to pin 11 to 14 pf LCD respectively
{LCD -   PIC
VSS      GND
vdd       +5v
vee      4k7 reostat
rs         RD2
rw        gnd
e        RD3
d0      gnd
d1     gnd
d2     gnd
d3      gnd
d4      rd4
d5      RD5
d6      RD6
d7      RD7    }
pin 21 to pin 4 of LCD
pin 22 to pin 6 of LCD
lcd pins 1,5,7,8,9 n 10 are grounded
pin 2 of LCD connected to +5 V
n pin 3 to variable rheostat of 4k7
N I M GETTING SINE WAVE ACROSS CRYSTAL WITH REFERENCE TO GRND instead
of square wave
m unable to get the prob.
plzzz help