Error with Windows Live Writer since WP 3.0

Hi, here is my problem.

Just a few moments ago I upgraded my blog to WordPress 3.0. I use Windows Live Writer to publish and it was working perfectly with the 2.9.2 versión of WP, but since the upgrade the WLW isn’t working good.

Every time I try to get the list of posts i’ve published to edit them i receive this error:

“The anser from the method metaWeblog.getRecentPosts received from the server is not valid:

Invalid response document returned from XmlRpc server”

Does anyone knows how to fix this??

Thanks.

Edit: Even if i get to obtain a post from my server after editing it and when i try to publish it again i receive the same error, so I can only publish new post but can’t edit old ones.