multiprocesor

i have had some hitch when i writed program about multiprocessor communication

- program of master transmit 2 byte (address byte ,data byte ) and program of slave is received data byte but it can't,pleasecheck for me , if it's false please correct or show me how to do ?
thanks very much !!!

.....................
.....................
static data unsigned char databyte=0x40;
static data unsigned char address=0x0F;
static data unsigned char datax;
static void com_isr (void)interrupt 4 using 2
{
if (TI==1)
{
TI=0;
SBUF=datax;
}
}
void main(void)
{ EA=0;
SM0=1; //mode 3
SM1=1;
SM2=1; // mode multiprocessor
REN=1;
PCON &=0x7F;
TMOD=0x20; //...
TH1=0xF3; //baud rate 2400
TR1=1; //....
TI=1;
datax=address;
TB8=1;
EA=1; // enable interrupt
ES=1;
_nop_();
_nop_();
_nop_();
datax=databyte;
TB8=0;
TI=1;
EA=0;
ES=0; // disable interrup because only transmit two byte
while(1)
{}
}
....................................
-Program of slave is received databyte (with address is correct):
...........................
static data unsigned char datax;
static data unsigned char dulieu;
static data unsigned char address;
static void com_isr(void) interrupt 4 using 2
{ if(RB8==1)
{ if (RI==1)
{ RI=0;
address=SBUF; //receive address (the first)
P2=address; //output port2 to test
}
if (address==0x0F) // comprare address
{ SM2=0;
}
else
{ EA=0; //disabled serial port interrrupt
ES=0;
}
}

else
{
if(RI==1)
{ RI=0;
databyte=SBUF; // receive databyte (the second)
P1=dulieu; // output port1 to test
SM2=1;
}
}
}
void main (void)
{
EA=0;
SM0=1; // mode 3 ,uart 9 bit
SM1=1; //....
SM2=1; // multiprocessor
REN=1;
RI=0;
PCON &=0x7F;
TMOD=0x20; // baudrate 2400
TH1=0xF3;
TR1=1;
ES=1;
EA=1;
while (1)
{}
}