The AutomaticUpdater control & Expression Blend

Has anyone been able to open a WPF window with the AutomaticUpdater on it in Expression Blend? We've been trying to do it in Expression Blend 4, but it doesn't seem to read the namespace properly. It gives us this error:

"The name "AutomaticUpdater" does not exist in the namespace "clr-namespace:wyDay.Controls; assembly=AutomaticUpdaterWPF, Version=2.6.1 4.0, Culture=neutral, PublicKeyToken=41f970429d9c8a0e"

Has anyone else had this problem?

We don't test the AutomaticUpdater in Expression Blend -- so it may or may not work. Does everything work when you open the design in Visual Studio? Are you adding the AutomaticUpdater to a Window (and not something else like a Panel)?

Also, are you using the correct AutomaitcUpdater WPF control? We have one for .NET 2.0, 3.0, and 3.5 and one for .NET 4.0.

We get the exact same problem. It makes it a pain to work in both when needed. To work around the issue, we have to remove the control each time we need to edit items in Blend on a specific window.