Please help me!

I'm logged in to WLW, made an blog post but now blogger won't let me in via wlw! 
It's a window asking for username and password to blogger. 
I've been blogging from wlw to blogger for five years, and tried every single password and username I've had since. Nothing works!
I logged out from blogger blogspot to try and see what username and password I have.
But I am logged in with my google+, gmail address and a brand new password. They don't match either from wlw. 
What to do?