Help needed with auto gearbox

[2fast2catch]

As many of you know i had to take the engine out of the 200sx as crank needed replacing, everythign went smoothly and to plan and engine and gearbox went back in on monday.... but there is no drive from the auto box, engine turns runs sweet as a nut, but wont select gears, reverse lights come on but no movement,

had the engine plus gearbox back out yesterday to make sure all is plugged in correctly etc, all was fine, torque converter is full and everything is connected so it went back in but still no drive.

really really need some help on this one, any ideas guys?

 

[HDi fun]

Is this the Jatco box with P R N D 2 1 and a switch on the right to disable 4th and O/D?

 

[steviem]

Did it all work ok before you ahd problems with the engine? Is there power going to the solenoids to select the gears or would it be worth checking the relief valve on the transmission pump incase it was stuck open maybe!!

 

[HDi fun]

Not just as simple as fluid levels is it?

A/T's are bastards to check