lazezo

hi all
i have an cheap RC plane
shangfei-toys sf556 3.5 CHANNEL R/C HELICOPTER WITH GYRO AND LIGHT
it was working well before i stored it!!
i follow the instruction of store
remove transmitter battery and disconnect plane battery
and cover it well from dust!

now after charge it and using new remote control battery
it wont work
the problem is the led of transmitter is flashing
to start operation the throttle stick must move up then down so transmitter led stop flashing and that mean i can start the plane
i guess the transmitter before start operation need to check full function of throttle !!.
am i right??
at the same time i can turn on and off plane light using transmitter light button!
that mean transmitter and reciever are ok right?

so is the problem in throttle control stick?
i open the transmitter and try to measure the resistant of throttle but
it's 1 k ohm and doesn't change with moving the stick!
i try to measure the 2 axis throttle (acc/decc and left/right) but it is the same, fixed 1 k ohm !!
do i have to disconnect the throttle for correct measure?

it was working before store so what happen?
is it the dust? even it was covered well!and no dust inside transmitter!!
can i disconnect the throttle and open it and clean internal parts???
and if so is there any instruction?

any help?
thanks