Hello everyone, I'm learning to program my 8051 in C. I´ve tryied handleing serial interruptions but I failed.

what I expected is that onced entered the infinite loop, if it recieves a byte then it should call the serial interruption and echo the byte.

I will apreciate any kind of help, thanks.
Here is the code...

/*------------------------------------------------
includes
------------------------------------------------*/
#include <stdio.h>
#include <reg52.h>

/*------------------------------------------------
declarations
------------------------------------------------*/
void serialini (void);
void serialint (void);

/*------------------------------------------------
The main C function. Program execution starts
here after stack initialization.
------------------------------------------------*/
void main (void) {

serialini(); /*Inicialize serial */
printf ("Hello World\n"); /*Print "Hello World" */
while(1); /* infinite loop */
}

/*------------------------------------------------
Setup the serial port for 9600 baud at 11.0592MHz.
------------------------------------------------*/
void serialini (void){
SCON = 0x50; /*SCON: mode 1, 8-bit UART, enable rcvr*/
TMOD |= 0x20; /*TMOD: timer 1, mode 2, 8-bit reload */
TH1 = 0xfd; /*TH1 reload value for 9600 baud */
TL1 = 0xfd; /*TL1 reload value for 9600 baud */
TR1 = 1; /*TR1: timer 1 run */
TI = 1; /*TI: set TI to send first char of UART*/
}

/*------------------------------------------------
Serial interruption, echoes the incoming byte
------------------------------------------------*/
void serialint (void) interrupt 4 {
putchar(getchar());
}