Server Error in '/' Application.
--------------------------------------------------------------------------------
 
Runtime Error 
Description: An application error occurred on the server. The current custom _
  error settings for this application prevent the details of the application _
  error from being viewed remotely (for security reasons). It could, however, _
  be viewed by browsers running on the local server machine. 
 
Details: To enable the details of this specific error message to be viewable on _
  remote machines, please create a <customErrors> tag within a "web.config" _
  configuration file located in the root directory of the current web _
  application. This <customErrors> tag should then have its "mode" attribute _
  set to "Off".
 
...

<%@ Page Language="VB" %>
<script runat="server">
   Dim pic As Double = 2.0
 
   Sub Page_Load()
      fx()
   End Sub
 
   Function fx() As Boolean
      Response.Write("Hallo Welt")
 
      Return True
   End Function
</script>