LCD interfaccing with AT89S52

I have interfaced AT89S52 with 16x2 LCD display and used following code. But nothing is being displayed on the display. Pls help me.

#include<reg51.h>
sfr lcd_data_pin=0xA0; // data port P2
sbit rs=P3^0; // Register select pin
sbit rw=P3^1; // Read write pin
sbit en=P3^6; // Enable pin
void delay(unsigned int msec) //delay function
{int i,j;
for(i=0;i<msec;i++)
for(j=0;j<1275;j++);
} void lcd_command(unsigned char comm) // function to send command to LCD
{ lcd_data_pin=comm;
en=1;
rs=0;
rw=0;
delay(1);
en=0;
} void lcd_data(unsigned char disp) // function to send data on LCD
{ lcd_data_pin=disp;
en=1;
rs=1;
rw=0;
delay(1);
en=0;
} lcd_dataa(unsigned char *disp) // function to send string to LCD
{ int x;
for(x=0;disp[x]!=0;x++)
{ lcd_data(disp[x]);
} }
void lcd_ini() //Function to inisialize the LCD
{ lcd_command(0x38);
delay(5);
lcd_command(0x0F);
delay(5);
lcd_command(0x01);
delay(5);
lcd_command(0x06);
delay(5);
lcd_command(0x80);
delay(5);
} void main()
{ lcd_ini();
lcd_dataa("Samhitha");
delay(500);
lcd_command(0x01);
delay(5);
lcd_command(0x06);
delay(5);
lcd_command(0x80);
delay(5);
lcd_dataa("GITAM");
delay(500);
} Can anybody suggest me what could be the problem?