Are you getting a "The root activity type is invalid" error with the Custom Activity Designer sample?

Are you getting a "The root activity type is invalid" error with the Custom Activity Designer sample?http://blogs.msdn.com/tomlake/archive/2007/12/10/are-you-getting-a-the-root-activity-type-is-invalid-error-with-the-custom-activity-designer-sample.aspxSeveral peolple have gotten a "The root activity type is invalid" error when using the Custom Activity Designer sample that can be found at http://wf.netfx3.com/files/folders/activity_behavior/entry840.aspx . I created an update project that should resolveenCommunityServer 2.1 SP1 (Build: 61025.2)re: Are you getting a "The root activity type is invalid" error with the Custom Activity Designer sample?http://blogs.msdn.com/tomlake/archive/2007/12/10/are-you-getting-a-the-root-activity-type-is-invalid-error-with-the-custom-activity-designer-sample.aspx#8999130Tue, 14 Oct 2008 10:14:49 GMT91d46819-8472-40ad-a661-2c78acb4018c:8999130fdagher<p>really nice work. i'm wondering how to host this designer in a windows app and how to generate an image screenshot out of it?</p> <p>this can really be an alternative for the state machine & sequential workflow designers with a bit of improvements.</p>