Heatbed output 0Volts

hi friends.

i have an ANET A8, i want Upgrated for Diamond hotend that i can use 3 colors...

today i just installed marlin V1 this version : [github.com] (why the new version of marlin not updated for diamond hotend or dual hotend for ANET A8 ??? we still use the old version :( )

i use this ARDUINO IDE 1.0.6 realy very old version, brocking all times
[www.arduino.cc]

Anyway i use it for my diamond hotend.

all works fine, auto_level, hotend... BUT NOT THE HEAT END
i have 0°C in LCD, the external mosfet not turn on

BUT if i write this command: M303 E-1 the blue led of mosfet turn on and the bed works fine.

but if i want heat it from LCD or from pronterface button thats not work and i have always 0°C on LCD and 0Volts output D8

i think the pins is disabled from framwork or something...

please help