Problem with Windows Live Movie Maker. Can anyone Help me Please.

I was trying to upload a video to YouTube, and it has worked plenty of times, but recently it gives me the message that my password is incorrect. So I tried changing it twice, and it still did not work. I checked the username, it was right, my keyboard in case a button was not responding, everything was fine, and I updated but still to no avail. I thought it was just having issues so I reset my computer and tried again, same issue. I thought it was an issue with YouTube, so I tried uploading through it and had no problems. Now you may be thinking, "why don't you just upload through YouTube then?" That is because it is MUCH faster uploading with Movie maker. Is there anything that can be done about this, or am I just up a creek with no paddle?