Can't log in

I'm not sure what launcher type it is, if that's what the affects version/s thing means, but all I know is that when I log in with the correct Minecraft information (it works on the website) it doesn't work on the launcher. It just says the information is invalid when it isn't. I don't know if this has something to do with it, but it also says "no connection" after I try when before it said connected. I don't know if that effects anything though.