I have Telerik controls for ASP.NET used in a web page in my project. There is a RadAjaxPanel, which has a RadComboBox. This combo box has a RadTreeView placed inside it. When a node is clicked in the RadTreeView, the NodeClick event for the RadTreeView is fired which populates data in a RadGrid placed inside the same RadAjaxPanel. The requirement is when the data is getting fetched, a progress bar should appear to indicate a background processing. It is working fine. But, once the grid is loaded, the RadComboBox is disabled and is not available again for selection. Kindly advice me on how to make the RadComboBox available for selection even after the first node click has taken place.