When I login, it logs me out when i click on a score

I login with my valid username and password, and it works, and then I browse scores, and it works. However, when i click on a score, it automatically logs me out and i cannot download it. Even when it says "you need to sign in to download", I click on sign in and it just refreshes the page. This website looks great and I would love to be able to use it. Thanks