Two 16F873 I2C Communication Addressing - pic

Question

I'm trying to communicate between 2 16F873 by using I2C. I wired ;
SDA > SDA ( Pull-up with 3.3k resistors )
SCL > SCL ( Pull-up with 3.3k resistors )
GND > GND ( Common)
Used 4Mhz crystal on both with x2 22pF cap to OSC1 and OSC1 pins.
5V with 10k resistor to MCLR* pin.
Here are the Master and Slave codes which sends "0xFF" data to set all B Pins High. I connected a led with 220ohm resistor to any of these b pins but cant see that the led lights.
So assume i have a problem with addressing of the slave. As i read from the datasheet, address of slave is 7-bit and the last bit (bit 0) indicates data goes from master to slave ( for lsb 0 ). That's why master say 0x20 and slave address is 0x10. (0 is added as LSB).
Do i have to add additional register bits to set anything else? What is the problem here.
I've compiled all codes with PIC C Compiler (5.007)
Master Code
#include <main.h>
void main()
{
i2c_start();
i2c_write(0x20);//slave address
i2c_write(0xFF);//data
i2c_stop();
while(TRUE)
{
//TODO: User Code
}
}
Main.h (for master)
#include <16F873.h>
#device ADC=16
#FUSES NOWDT //No Watch Dog Timer
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#use delay(crystal=4MHz)
#use i2c(Master,Slow,sda=PIN_C4,scl=PIN_C3)
Slave Code
#include <main.h>
#use i2c(Slave,Slow,sda=PIN_C4,scl=PIN_C3,address=0x1d)
#INT_SSP //Interrupt for I2C activity
int8 data;
void sspinterupt()
{
int8 state;
state = i2c_isr_state();
if(state < 0x80) //Master is sending data
{
data = i2c_read(); //An array will be needed to store data if more than one byte is transferred
}
if(state == 0x80) //Master is requesting data
{
i2c_write(data);
}
}
void main()
{
set_tris_b(0x00);
enable_interrupts(INT_SSP);
enable_interrupts(GLOBAL);
while(TRUE)
{
output_b(data); //Output data to port B to visualize
}
}
Main.h (Slave)
#include <16F873.h>
#device ADC=16
#FUSES NOWDT //No Watch Dog Timer
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#use delay(crystal=4MHz)
Proteus Design
Proteus Design