cogging hobbywing 150A

[jalodo56]

Hello I have just put the esc in my e-maxx with a neu 1515 2.5d on 5s geared for 42mph.... But with the truck is runing in very slow speed, about 1mph-2mph its do cogging..... when the truck go more fast, about 5mph it doesn't have cogging..... What is causing the cogging?
The wires have good solder.........
my esc program is:
Running mode: Forward/reverse with brake
drag brake:0
cut off: 3.2v
Star mode(punch): level 3
max brake force: 100%
Max reverse force:25%
neutral range: 9 normal
Timing: 11.25
Over heat protection: Eneable
Motor rotation: Counter Clockwise
Lipo cells: 5