Help with my transmitter!

[bigbarryfatbaps]

Hi guys

I'm getting back into RC - bought a Cat K1, and corresponding Core-RC receiver / transmitter.

Everything is plugged in correctly, but to make the car drive forward I have to pull back on the throttle stick - not push forward.

Am I overlooking something stupid here - i'm running brushless and all my motor cables and sensor cable are wired up correctly?