it says " Failed to login: java.io.IOException: Server returned HTTP response code: 503 for URL: http://session.minecraft.net/game/joinserver.jsp?user=JUANITO_RANGEL&sessionId-token%3A6db4d355f2f4dbd92ff88f319f83d13%3Ad8b746464e1bae489384d37cfb8049c7d6&serverId=-6bb7ecb83452801a1eb246a68ebb27650ec4202 "
Environment
windows 7
MC-32139 - Mojang's servers are currently unstable.
Use search function next time.