Convertible stop stuck
 

I am working on a 1987 Carrera 911 Convertible, I put the top up, it is automatic, but it did not lock into the windshield. Now it is stuck in that position, it will not go any further and lock in, and it will not go back down. Any suggestions on how to fix this, or is there a way to put the top back down manually? Any help will be much appreciated.