I created my account and downloaded the game to play. When I press play and enter my email and password, it tells me they are invalid? Is anyone else running into this problem?

Hmm, I would say that you're having problems logging in because the beta event is over and the server is closed. Just a guess....

Read your email.

Will they reopen the beta again sometime?

I understand the beta is (currently) over and the beta forums closed as well, but you can't talk about either on these forums.

I can imagine when the beta continues or enters its next iteration, there will be news posted on the home page.