I start a modpack but it don't let me to login

[bbbbende]

Launcher Version: technic launcher

Operating System: windows 7

Java Version: newest

Antivirus Program: eset nod (newest)

Description of Problem:

I start a modpack then it says Invalid username/password combination i tryed it many times PLS FIX IT

Error Messages:

Invalid username/password combination

Error Log:

[Calvariae]

It requires a valid Minecraft username/password, i.e. the same credentials that you use for the vanilla launcher.