Printf not working in STM32F303VCT

Hello,

i´ve followed all tutorials/threads trying to send printf() to the Debug(Printf)Viewer but not luck untill now. i can see the corrects characters within the ITM Stimulus Port Register 0, so i guess my code is right (i paste it at the buttom of the message)
I have also checked and SB10 solder bridge is made in my board.

i´m using ST-LINK/V2 for debbuging, and i also updated the trace setting in Options for target like that:

-> Core Clock to 72MHz
-> Trace Enable checked
-> ITM Stimulus Ports: www.keil.com/.../ulinkpro_trace_itm_viewer_port0_0.png

Where else should i look when Register are correctly updated but they are not showed in the Debug(Printf)Viewer?

/************************************************************************/

/#include <stdio.h>
#include <rt_misc.h>
#include "stm32f30x.h"
#pragma import(__use_no_semihosting_swi)

struct __FILE { int handle; /* Add whatever you need here */ };
FILE __stdout;
FILE __stdin;

int fputc(int ch, FILE *f)
{ ITM_SendChar(ch); return(ch);
}

int fgetc(FILE *f)
{ char ch; ch = 1; return((int)ch);
}

int ferror(FILE *f)
{ /* Your implementation of ferror */ return EOF;
}

void _sys_exit(int return_code)
{ label: goto label; /* endless loop */
}