Sounds like the striker oring may not be traping gas to recock. Try putting any oil in the ASA before ya gas it up? I would suggest giving it a good cleaning ang oiling. Make sure the Striker oring(the oring on the hammer) is well oiled,still there, and intact.
Yeah Mirages are kinda cool. I got mine still sitting here and have tried to sell it but no one bites at it.