Control control = LoadControl(ControlName); PlaceHolder1.Controls.Add(control);When I click either of the RadioButtonLists or DropDownLists I get
--------------------------- Microsoft Internet Explorer --------------------------- Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled. Details: Error parsing near '<!DOCTYPE html P'. --------------------------- OK ---------------------------I Googled it and found this, http://weblogs.asp.net/leftslipper/archive/2007/02/26/sys-webforms-pagerequestmanagerparsererrorexception-what-it-is-and-how-to-avoid-it.aspx, but this is all greek to me. I have no clue what's wrong