error 65: access violation at C:0x000B : no 'execute/read' permission

error 65: access violation at C:0x000B : no 'execute/read' permission
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IÂ'm used the toolskit of silicon labs. And after (error 65: access violation at C:0x000B : no 'execute/read' permission) I canÂ't use the kit. Please if can you give me one hand. thanks.
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Build target 'Target 1'
compiling Luces 2.c...
linking...
Program Size: data=13.0 xdata=0 code=240
"Luces 2" - 0 Error(s), 0 Warning(s).

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And my program is:

#include<stdio.h>
#include<c8051f020.h>

#define reload 100 //cantidad de interrupciones en medio T (500 ms)

#define RECARGA ( 0xFFFF - 1000 )

void reset_timer1 (void);
void puerto_1(void);
void control (void);
void puertos (void);

unsigned int tick = reload;
unsigned char estado = 0;

void main (void){

reset_timer1(); puertos(); control ();

while(1);

}

void Control ( void ){ unsigned char in; in = P5 & 0x01;

switch ( estado ) { case 0: P5 = 0x10; break;

case 1: P5 = 0x30; break;

case 2: P5 = 0x70; break;

case 3: P5 = 0xf0; break; } }
void reset_timer1 (void){ WDTCN = 0xde; // watchdog timer WDTCN = 0xad;

TL0 = RECARGA; TH0 = RECARGA >> 8 ;

tick = reload;

TMOD=0X01; TR0=1; EA=1; ET0=1; }
void puertos(void){ //XBR0 = 0x04; // UART0 00000100 //XBR1 = 0x00; // Todo dehabilitado 00000000 XBR2 = 0x44; // crossbar y UART1 01000100 // pull-up

P74OUT = 0x08; // Configuro el puerto 5 como push-pull el // nibble alto y open-drain el nibble bajo P1MDOUT = 0x5f; P2MDOUT = 0xff; }