Problem displaying phrase in a 16x2 LCD

i'm trying to display a phrase to a 16x2 LCD using 8051 and C programming .But a line of square dots keep on displaying on the LCD,without displaying the phrase.
can u help me verify what wrong with the code????
your help is greatly appreciated.

Code:

#include <reg52.h>
#include <intrins.h>    

typedef unsigned char bit_8;

#define CLR 0
#define SETB 1

sbit DB0 = P1^0;
sbit DB1 = P1^1;
sbit DB2 = P1^2;
sbit DB3 = P1^3;
sbit DB4 = P1^4;
sbit DB5 = P1^5;
sbit DB6 = P1^6;
sbit DB7 = P1^7;
sbit EN = P3^7;
sbit RS = P3^6;
sbit RW = P3^5;
sbit DATA = P1;
sbit D7=P1^7;
bit_8 code *days[]={"*Sun*","*Mon*","*Tue*","*Wed*","*Thu*","*Fri*","*Sat*"};		

bit_8 code *val[]={"0","1","2","3","4","5","6","7","8","9","10","11","12"};			
bit flag;

bit_8 month=1,date=1,hh,lmin,hmin,hsec,lsec,day=0,lyear=5,hyear=0,date_count;

sbit Ready = P3^7;



void ini(void);
void command(bit_8);
void data_in(bit_8*);
void busy(void);



void main()
{
	bit_8 temp;
	ini();
	data_in("i love u");
}



void ini()
{	
	command(56);
	command(12);
	command(1);
	command(6);
}


void busy()
{
	D7=1;
	RS=0;
	RW=1;
	while(D7!=0)
	{
		EN=0;
		EN=1;
	}
}



void command(bit_8 val)
{
	busy();
	P1=val;
	RS=0;
	RW=0;
	EN=1;
	EN=0;
}



void data_in(bit_8 *string)
{
	bit_8 i;
	busy();
	for(i=0;string[i]!='\0';i++)
		{
			P1=string[i];
			RS=1;
			RW=0;
			EN=1;
			EN=0;
		}
}

 

attach '/0' and then send "i love you" to data_in(). Or attach it in data_in () before FOR loop.

try it ... i am not sure...