Hi MarjaR,
Can you create a page by the code below? Does it get the same problem?
<%@ Page Language="C#" Title="Customize the queue UI" %>
<%@ Register TagPrefix="CuteWebUI" Namespace="CuteWebUI" Assembly="CuteWebUI.AjaxUploader" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
</head>
<body>
<form id="Form1" runat="server">
<CuteWebUI:Uploader ID="uploader1" runat="server">
</CuteWebUI:Uploader>
</form>
</body>
</html>
If so, please post the uploader page url above, so we can check it for you.
Regards,
Ken