hi,i am currently working on a AS 1913.All the wheels are spinning freely.the problem is when i pull out the stem to operate the hand function everything turns,including the mainspring barrel.when i push it back in the crown wheel engages and turns everything again.when i release the click to let the power down nothing happens.i have checked the keyless works and everything moves up and down as it should.am i missing something.i have tried using a different barrel (same model) but to no avail.any ideas please.B