Weird Problem with ESC..I think!

Ok so here is my Hyper TT and it is running kinda weird. Here is a vid.

It has a Speed Passion GT PRO 2.0 ESC and a
Tekin SC4X 4.5T 550 motor a Savox 1258 servo. My problem is that the boost function is not kicking like it should.

As you can tell from the video I am holding it at full throttle and it kicks into boost after a few seconds. I tried a new sensor wire and will be changing out the motor to a Novak Ballistic 4.5 550 to see if it helps. I am also running the current firmware on the ESC and the settings are the ones from Speed Passions website for the SCTE Losi truck. I tried a new sensor cable and it still does the same thing. As you can see in the vid it is cutting out right before the boost kicks in.

Am I pushing the ESC too hard with the 4.5??

If you have any thoughts please let me know.

[YOUTUBE]http://www.youtube.com/watch?v=-dzlUymPTUg[/YOUTUBE]
http://www.youtube.com/watch?v=-dzlUymPTUg