We have a RadCombobox in an updatepanel. There is also a fileupload control in another updatepanel. The Radcombobox displays correctly until a file is uploaded. But after the file is uploaded, the Radcombobox displays only a text box and a "select" link which is not clickable. I am lost what could be the reason for this rendering. There is no modifcation in the RadcomboBox display from the code behind except for filling the combobox items. Please advise. This has become a critical issue. Any quick help is greatly appreciated.