Minecraft Launcher doesn't work

Hello,

I've bought a minecraft gift card. After I created a minecraft.net and downloaded your Launcher ,but when I loged in to the Launcher it sais "If your account was created after November 2012 or if it has been migrated, use your email. Otherwise use your username." But I have tried it for 2 h and it still doesn't work. Can you help me ?

Thank you

Max