Problem with Novak GTB

[Scoobster]

I have installed a Novak GTB Brushless system in my Lazer but i'm having a couple of problems with it first i think i can live with but the thing is when you first switch on the ESC the motor spins up for a second or two then stops, Is this normal?

Second problem is a bit more of a pain sometimes when you give it full throttle out of a corner it doesn't give you full throttle i would say it only runs around half throttle but if you back off then give it full throttle again it will clear and go like stink!!! anyone else had this problem?

Cheers

Del