Thank you for contacting us.
I suppose that you are trying to compile the latest Demo app using older binaries. These properties are new for the control and they are available in the latest Q1 2012 BETA release. Please make sure that you are referring to the latest assemblies. You may also manually delete the Bin and Obj folders of the app to ensure that no previous binaries are cached.
Let me know if you continue to experience the problem.
the Telerik team
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