Minecraft error login

I can not longer than the week log on the minecraft account. The whole time is offline. I changed the password but it does not. I bought the premium long ago.
my version:
2.0.847 Mon, 10 Apr 2017 07:44:54 GMT 074c48897160ceef596e988b6ee6098536c02f9a
I can not play, log. Displays only a demo game.