Proper Credit but when I registered to be able to login, it IMDB doesn't recognize me as that person that is being credited.

I have been given proper credit and I am happy about that. I wanted to add a picture of me but when I login and click on my name where I am credited, I am very limited. It is as if it does not know that I am the James Paul that is being credited. How do I fix that and link my registration with the credit given to me on a film