problem in iterfacing AT24C16A serial eeprom

I have interfaced P3.3to scl & sda to p3.4.........
#include<REGX51.H>
#include<stdio.h>
#define LCD_DELAY=56
void acknowlg();
void start();
void stop();
void read();
void write(unsigned char p);
void delay(unsigned int ms);
int a,b,c,d,i;
void main()//operate eeprom.
{ stop();
start();
write(0xA0);
acknowlg();
write(0xAA);
acknowlg();
P1_2=0;
//write(0xFF);
acknowlg();
stop();
delay(1);
start();
write(0xA1);
acknowlg();
read();
stop();
P3=d;
P1=d;
while(1);
} void delay(unsigned int ms)//1 ms delay(variable).
{ unsigned int n; unsigned int i;

for (n=0; n<=ms; n++) { for (i=0;i<LCD_DELAY;i++); }

}
void start()//start the communication (h to L)
{ P3=0x00;
P3_4=1;
P3_3=1;
delay(1);
P3_4=0;
delay(1);
P3_3=0;
} void stop()//stop the communication(L to h)
{ P3_4=0;
P3_3=1;
delay(1);
P3_4=1;
delay(1);
P3_3=0;
} void write(unsigned char p)//write in serial order
{ P3=0x00;
P2=p;
for(a=0;a<8;a++)
{ P3_3=1;
delay(1);
P3_4=P2_7;
delay(1);
P2=P2<<1;
P3_3=0;
} P3=1;
delay(2);
P3=0;

BUT UNABLE TO DO IT PLS TELL ABT ACKNOWLEDGE FUNCTION AND CODE FOR ME IF POSSIBLE..............
} void acknowlg()//seek acknowledgement from memory
{ //P3=0xFF;
P3_3=1;
delay(1);
while(P3_4==0)
{ }
delay(1);
P3_3=0;
} void read()//to read byte from eeprom.
{

for(b=0;b<3;b++)
{ i=P3_4;
P3_3=1;//set as input.
delay(2);
P3_3=0;
P3=P3<<1;
} P3_3=1;
delay(2);
P3_3=0;

for(b=0;b<4;b++)
{ //P3_3=1;//set as input.
delay(2);
P3_3=0;
P3=P3>>1;
} acknowlg();
P3_3=1;
delay(2);
P3_3=0;
}