Problem On Asp.net Pages

[sagnik]

Sir, I'm getting the following error when opening the .aspx file in browser:

 

Server Error in '/' Application

Document element did not appear. Line 1, position 1.

Description:HTTP 500. Error processing request.

Stack Trace:

System.Xml.XmlException: Document element did not appear. Line 1, position 1.

at Mono.Xml2.XmlTextReader.Read () [0x00000] in <filename unknown>:0

at System.Xml.XmlTextReader.Read () [0x00000] in <filename unknown>:0

at System.Xml.XmlReader.MoveToContent () [0x00000] in <filename unknown>:0

at System.Configuration.Configuration.ReadConfigFile (System.Xml.XmlReader reader, System.String fileName) [0x00000] in <filename unknown>:0

at System.Configuration.Configuration.Load () [0x00000] in <filename unknown>:0

at System.Configuration.Configuration.Init (IConfigSystem system, System.String configPath, System.Configuration.Configuration parent) [0x00000] in <filename unknown>:0

at System.Configuration.Configuration.connector (System.Configuration.InternalConfigurationSystem system, System.String locationSubPath) [0x00000] in <filename unknown>:0

at System.Configuration.InternalConfigurationFactory.Create (System.Type typeConfigHost, System.Object[] hostInitConfigurationParams) [0x00000] in <filename unknown>:0

at System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration (System.String path, System.String site, System.String locationSubPath, System.String server, System.String userName, System.String password, Boolean fweb) [0x00000] in <filename unknown>:0

Version information: Mono Runtime Version:2.6.7 (tarball Thu Oct 18 23:33:40 PDT 2012); ASP.NET Version:2.0.50727.1433

 

How I can fix the problem?