Hello Geoffrey,

I followed the steps you suggested and was unable to reproduce the behavior you're describing.  I created a sample using 10.3.20103.2105. I placed a WebScriptManager and WebDataMenu in the page and the in the Page_Load I constructed the menu by adding items. I saw the expected the results of the menu displaying properly will all items showing as well as their children when clicked or hovered over.

I have attached the sample project I used to test this.  Please test this project on your PC; whether or not it works correctly may help indicate the nature of this problem.

If the project does not work correctly, this indicates either a problem possibly specific to your environment, or a difference in the DLL versions we are using.  My test was performed using version 10.3.20103.2105 in NetAdvantage for ASP.NET 2010 Volume 3.

If the project does show the product feature working correctly, this indicates a possible problem in the code of your application.  It will help if you can provide a small, isolated sample application that demonstrates the behavior you are seeing.

Or, if this sample project is not an accurate demonstration of what you're trying to do, please feel free to modify it and send it back, or send a small sample project of your own if you have one.

Please let me know if I can provide any further assistance.

Sincerely,
Mike P.
Developer Support Engineer
Infragistics, Inc.
www.infragistics.com