Keil C51 & printf to UART1

I am trying to receive debug messages to UART1 in Keil 4

This peace of code successfully works with Generic 8051 device and internal simulator.

But when I open real device (EX-F34x-Q-48) debug has stopped on checking interrupt bit.

For real device I have put another "h" file - c8051F340.h

What I am wrong?

//-----Fosc = 11.592MHz, Baud Rate = 9600-------//
#include<reg51.h>


void uart_init();
void timer_init();
void uart_tx(unsigned char x);
unsigned char uart_rx();
void uart_msg(unsigned char *c);
void n_line();

void delay(unsigned int ms);

unsigned char tx_data;

void main()
{
	uart_init();
	uart_msg("Initializzing Serial Communication");
	n_line();
	delay(10);
	uart_msg("Processing.....");
	delay(1000);
	n_line();
	uart_msg("Connected");
	n_line();
	while(1)
	{
		uart_msg("<<");
		tx_data = uart_rx();
		n_line();
		n_line();
		uart_msg(">>");
		uart_tx(tx_data);
		n_line();
		n_line();
	}
}

void uart_init()
{
	SCON = 0x50;
	timer_init();
}

void timer_init()
{
	TMOD = 0x20;
	TH1 = 0xFD;
	TR1 = 1;
}

void uart_tx(unsigned char x)
{
	SBUF = x;
	while(!TI);
	TI = 0;
}

unsigned char uart_rx()
{
	unsigned char z;
	while(!RI);
	z = SBUF;
	RI = 0;
	return(z);
}

void uart_msg(unsigned char *c)
{
	while(*c != 0)
	{
		uart_tx(*c++);
	}
}

void delay(unsigned int ms)
{
	int i,j;
	for(i=0;i<=ms;i++)
		for(j=0;j<=120;j++);
}

void n_line()
{
	uart_tx(0x0d);
}

TI0 in header file has another value...

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