ATTINY26+SIMULATOR+PROBLEM

#include <stdlib.h>

#include <stdint.h>

#include <avr/io.h>

#include <avr/interrupt.h>

#include <avr/delay.h>

extern void init_io(void);

extern void init_timer0(void);

ISR(TIMER0_OVF0_vect);

/*-------------

 *Pin-Belegung:

 *  PortA:

 *    Pin0: LED 1

 *    Pin1: LED 2

 *    Pin2: LED 3

 *    Pin3: LED 4

 *    Pin4: LED 5

 *    Pin5: LED 6

 *    Pin6: LED 7

 *  PortB:

 *    Pin0: LED 8

 *    Pin1: LED 9

 *    Pin2: Transistor 1

 *    Pin3: Transistor 2

 *    Pin4: Transistor 3

 *    Pin5: Transistor 4

 *    Pin6: Taster 1

 *    Pin7: Taster 2

 */

  int ledgruppe=4;

  int lader=0;

//----

//MAIN

//----

int main(void)

{

  PORTA=1;

  cli();

  init_io();

  init_timer0();

  sei();

  while (1)

  {

    if (!(PINB & (1<<PINB6)))

    {

      if (lader < 245) // !!!!!hier springt er net rein

      {

        lader=lader+10;

      }

    }      

  }

}