If they didnt get stuck before you removed the clutch, but they do now after reassembly, then its probably something you have done.
The inner bearing can easily slip off the shaft if you have moved the inner clutch plate while you were fiddling around. If the inner bearing has slipped off then the lever will jam. I know this from making the same mistake myself. It can slip off even if you do not even remove the chains or the inner clutch plate.
As I said earlier, an indicator for this problem might be that the outer castle nut will not do up very far. You will barely be able to insert the split pin. Did you notice any difference about the castle nut?
Apart from that, as 6brnorma has stressed, you have to follow the actuating nut adjustment procedure exactly as per the instructions. But doing that job is a real pain, so you want to eliminate any other possibilities first.