You are playing TSW1 (TSW2020) right? Anyway it's a switch that should be on the left beneath the main console (if it makes sense to the left of "your" legs)
Release brakes and move throttle and AFB levers to idle/0, then switch On the AFB. Note: You can also switch On the AFB during the run, only remember to move (like above) all to idle/0 except the AFB lever who in this case need to be set to max, then switch On AFB.
I dont understand , like i set brakes free trochle off and I może the afb to 100km h and it doesnt move , is there any button?
Try to give more power with the throttle. Every brakes have to be released (...also the electric one)
Did you turn the AFB switch to the left of your legs on? (It's hard to find). When you have done so successfully, a stern male voice will declare "A-F-B" just to confirm it.