It may need cleaned and lubed. I use liquid wrench or PB blaster and saturate the hub, to loosen up the old grease inside the hub, so the pawls grab instead of being stuck in the closed position. I spray a ton of it in there through the shifter opening in the axle after taking out the rod, and where the bearings are on each side. It doesn't always work, then the hub will have to be opened and cleaned out and checked.