"help" motor extruder 1 & 2 (at slave) can't work - tri colour mendel

Hi,. everyone

I need help immediately.,
after I finished the comissioning process.
why I can't move motor 1 and 2 (which controlled from slave).
do I skip something ?

I sent this command :
"M302
G90
M83
T1
G1 F500 E10"

when I sent those code to T0, it works fine. but for T1 and T2 it didn't work.

does anyone know why it didn't work ? I'm so frustated solving this problem

thanks'