So you put it into gear, and when you release the clutch, nothing happens?
Maybe your clutch is somehow comepletely ruined, or its slipping at the differential?
Im not familiar with 2 speed rear ends so that may not be possible.
Have someone look at the driveshaft while you have it in gear and try to drive away. If the driveshaft spins but the wheels dont turn, its the 2 speed rear end. If you get it in gear, let out the clutch, and the driveshaft doesnt spin, then its either the clutch, which would be weird, or the gear shift linkage not getting the trans into gear.
Patina enthusiast and professional busman