I've opened the assembly and it looks to me that it is a imported file, likely STEP or IGES.
I've done some mate's and the hinge is working now as an hinge should work.
I am on a SW 2013 student version, I hope you can go further with your design.
hinge.rar.zip 4.1 MB
I hope this is what ment with your question.
If it's not I would like to help further with it.
If anyone else has this sort of problem, you are welcome and I would like to help you.
Anyway ,good luck with your project.
If you use it as a sub-assembly be sure to set it's properties to Flexible in the main assembly.