made my first little movie, now can't upload it to youtube

[magical thyme]

I've already posted this in the tech help forum, but in case somebody here has dealt with this, I keep getting the message, "server has returned an invalid response."

It's a .wmv file made on windows moviemaker. My browser is IE w/silverlight. As far as I know, I've removed my adblocker s/w -- although the ads are still blocked, so maybe not. I can't find any other adblocking s/w in my programs list. I renamed the file in case the underline in it was causing the problem.

The only thing I haven't tried is overriding the wireless w/a direct connection.

If anybody has overcome this issue, please advise!