I have just bought an old Meopta Flexaret Automat VI TLR camera but there seems to be a problem with its shutter. When I have the back open the shutter seems to work fine but it won’t do anything when I close it back up (either with or without film in). I have made sure that the shutter lock is not on when testing this out and it is really frustrating as I have looked forward to owning this camera for some time and can’t make sense of why it seems to be in working order when the back is open. It would be really appreciated if anyone can offer me advice on this; it could quite easily be a simple thing (other than the above) as I am new to the world of medium format cameras. Thanks.