I remember running into this problem last year, and I solved it by working with Visual Studio 2005.
Does VS 2008 not have an xsd designer?
I remember running into this problem last year, and I solved it by working with Visual Studio 2005.
Does VS 2008 not have an xsd designer?
It wasn't released until VS2008 SP1, so it might not be in your version, but you should be able to download it.