Lock-nut question

yup, had it on 2 bikes.

1. Roatafix the f**k out of the sprocket http://204.73.203.34/fisso/eng/schpignone.htm
   
2. check you have the correct lockring (i had on with a small lip, wasn't gripping to the sprocket)
   
3. tighten that with a chainwhip
   
   

I wouldn't glue it unless the threads are ruined.

good luck!