I put a spy function. I transmmit through serial each status. I get only IDLE in I2C bus.

void main(void)
{
  uart_init();
  i2c_init(I2CINIT, 0);
  EA=1;
  uart_transmit(i2c_getstatus());
  IndexTx=3;
  i2cVetor[0]=0x00;   // MSB
  i2cVetor[1]=0x00;   // LSB
  i2cVetor[2]=0xA5;
  i2c_transmit(AT24C256);
  while (i2c_getstatus() & I2C_BUSY);
  i2c_transfer_finished();  
  uart_transmit(i2c_getstatus());
  while(1);
}