help with fan driver

iya guys

need another brain to help me as minds destroyed now

im trying to build up [www.thingiverse.com]

iv built it (many many times checking it )

putting m106 in pronterface does nothing at all with the fan

i have tested the circuit by putting 5V to the senser which then spins the fan (stopping when i remove 5V)

i am using latest marlin firmware and have checked that in motherboard = 62 in pins.h fan is set to pin 4

any ideas ?

now fixed

and i cannot explain the feeling of anger so much as to messing with this for over 4 hours! rebuilding re flashing lol

and then i sit back and think iv had enough for tonight

and it just happens to catch the corner of my eye

there is 2 referenced to fan_pin


#define LED_PIN -1

#define FAN_PIN -1 (should be 4) (didnt see all night )

#ifdef MELZI
#define LED_PIN 28
#define FAN_PIN 4 (saw this and took was already set)
#endif

ohh well at least its done