Windows Store won?t accept my Microsoft account password

[Windows Central Question]

I?m running Windows 8,1.
From the Windows Store I try to install Skype.
I click Install, and I get the message: "Add Windows Account" - here I type emailaddress & Password, but I get the message "Wrong password - be sure to use the correct password for your Microsoft Account"
The problem is, that it is the correct password - I can open a browser and succesfully login to my Microsoft account.
I have also tryed to reset my password, but same story.

Can any one please help me in this matter?

Kind regards,
Gert Eriksen.