Intermediate filter error - yet again

[Arctic Frost]

Hi,

I'm using VideoStudio 9 - the only one I have by the way - and am trying to create a video from .avi clips. I recently finished it, and got it to work perfectly, creating a video file, all right.

But then I decided I wanted to edit it a little more, so I opened up the file on UleadVS9, and edited the stuff I wanted to. However, now I am getting the

"No combination of intermediate filters could be found to make the connection"

error EVERY time I try to create a video file - .mpeg, .avi, or .wmv

I have no idea what to do, and changed nothing except the clips since the previous time when it worked.

I'd really appreciate any help given.

I'm using Windows XP Home

Thanks,
Andrew