I get the following when I click on a custom made webpart in the Web Part Gallery: "The control with ID 'UpdatePanel1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it." If I us the webpart, ie perfor a search, I get a pop-up error: "Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occured while processing the request on the server. The Status code returned from the server was: 500".This webpart takes a search string from a textbox, passes it to BL/DAL and returns a data from DB. I've integrated an UpdatePanel for partial postbacks - used this blog as guide http://sharepoint.microsoft.com/blogs/mike/Lists/Posts/Post.aspx?ID=3 but it is not working.I've added the scriptManager to the default.master page using MSSP Designer as the blog suggests but couriously, the script manager causes an error (red underline) "In Internet Explorer 6.0 the tag <asp:ScriptManager> is not permitted."Any pointer you can provide will be greatly appreciated.Thank you,EricEJM