transfer box help

I have just pulled a 300tdi engine and auto box out of a discovery and put it in my 90 , all was working fine while in the disco but now I cant get the transfer box out of neutral.

I have left to right movement thats it . I removed the housing to expose the high low shaft and its all lubricated but no movement on the shaft . is there a knack to getting in in gear.

thanks dan

have u moved any of the linkages

there are 2x shaft with diff lock running through middle of hi/low does hi/low rotate at all or is seized,the arm is on a spline and is adjustable by removing bolt and repositioning,linkage to box also has fine adjustment by 2 x nut ,on drivers side of box at rear top is 6mm allen screw which adjusts detent this can seize detent not screw undo and try and adjust by screwing in till cant select and out till can

I have opened up the housing were the hi/lo selector shaft goes " 6x 10mm bolts "

Theres a shaft that should move forward and backwards the seems seized or wont move .

4 bolts where the other 2 come off,you will have to take it to bits and clean it