Well what I do in a case like this is I remove the lock and send it to Brad Emig at Cabin Creek Muzzleloading and get back a lock that functions.  I don't even try anymore as I just don't have the expertise to fix them or harden the frizzen.  Trial and error can get expensive.  Good luck.    cabincreek.net/
 
Dave
Give them a call or send an email in advance to get an idea of the coast and set up sending it in for a rebuild.