Minecraft Launcher not letting me log in

Whenever I open my new minecraftlauncher (1.6.2 and 1.6.4) it comes up with email and password, when I log out it says only Play Demo.
What i expected to happen was, I type my email and password, then it works.
What did happen is, I open the minecraftlauncher then it comes up with enter your email and password things, I type it in, then it works, but sais "PlayDemo" instead of "Play"
What I did:
Step 1 - Open the minecraftlauncher
Step 2 - Comes up with Email and Password Boxes I type in my email and password
Step 3 - Works, but sais "PlayDemo" instead of "Play"