Danerlicious

I've been recently (out of NOWHERE) been having this problem where every time i try to play ANYTHING on the Technic Launcher, it just says "Unable to authenticate account with minecraft.net" when i have working internet connection, when i am logged into minecraft on my web browser and on my actual minecraft that actually works just fine. If anybody knows of ANY way i can fix this, PLEASE let me know so i can play Hexxit with my friends, thank you(: