yes, if I configure the MCLR bit in config word to "1" then the LED is ON because the transistor is open via internal pull-up. If I configute the MCLR bit to "0" then internal pull-up is disabled and the transistor is closed because the 1M resistor is pull the base to ground.
That's work, but how to do that in program I don't know. However, it must work somehow, because in PICAXE environment it works.