ArcGis Server开发问题ToolBar的toolbarItems问题

我在设定了buddycontrols后，点击toolbarItems的“...“按钮，弹出错误提示对话框

Value Cannot be null
parameter name:path1

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Some further clarification on this problem.
This error only occurs when you create your web app using File -> New -> Project -> Web -> Asp.Net Web Application. If you use the Web Mapping Application template available via File -> New -> Web Site -> Web Mapping Application then all is well, at least on my machine.

I copied a good Toolbar definition across from a template derived application and it works at run time, you just can't use the design time control to add toolbar items.
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