Windows movie maker on windows 8

Hi . I m here for looking for an answer for my ques. Yesterday I made a movie in windows movie maker on windows 8 and windows essentials version is 2012. And I want to upload it on youtube directly from movie maker so I used youtube button which was in movie maker. Then seen a window saying to sign in to Microsoft account . I have it and I entered my email and my password was of length 15 characters but I was able to only enter till lesser characters than 15 and when I click sign in button it was saying wrong password  so how I sign in . Help me guys and girls pls ?