Bell 407 Can't Start

Hello. I’m a bit confused about the cold and dark procedure for the B407. I’ve seen various videos and looks like I’m doing everything as they say but what happen is that the The RPM gets very very slowly to 40%… i mean it takes about 5 min… and then nothing. I can’t basically make it working.
Any suggestion?

This works for me:

Overhead
Boost Pumps Left and Right ON
Battery ON

Inst Panel
Horn Mute (Optional to kill alarm)
Fuel Valve ON and Gated

Collective
Throttle to IDLE
Starter Engage

After about 20 to 30 seconds
Throttle to Fly

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