Novak smart boost help

[Churk]

I'm running a Novak smart boost with a GTB and have wired it up as instructions explain. But when I switch the smart boost on the speedo doesn't come on.

[Tofuman]

I had this problem when I first used mine, Its something to do with servo protection. All you do is turn speedo on and off again.

Below is instructions of manual.

NOTE: With some Novak ESCs that include built-in
servo voltage protection, it may be necessary to switch ON, then after a moment, switch OFF the ESC’s switch for proper operation.

[Gazza]

Im running a NEW GTB2 and works with no booster try it ?