Hi aeroandes,
For your question is that the left transmitter sick should move up and down for the throttle.
When the throttle is pulled all the way back will be for idel.
The left stick(also for rudder) will move left and right.
The right stick is for elevator(up and down), and aileron(left and right)
Check to see if you have the throtle servo pluged in right slot in the receiver.
It should be marked on the receiver where each servo goes.
It seems that you might have have the rudder and throtle servos reversed.
You can have someone at a club (If you belong to one), or have someone at the hobbie
shop close by have some check your set-up for you they should be able to help you too.

Hope this helps,

Clarence
rcflyer