Error Updating

[ShadowProwler420]

Error Getting File List: System
at System.Configuration.ConfigurationRecord.Load(String filename)
at System.Configuration.DefaultConfigurationSystem.System.Configuration.IConfigurat ionSystem.Init()
at System.Configuration.ConfigurationSettings.SetConfigurationSystem(IConfiguration System configSystem)
at System.Configuration.ConfigurationSettings.GetConfig(String sectionName)
at System.Net.WebRequest.get_PrefixList()
at System.Net.WebRequest.Create(Uri requestUri, Boolean useUriBase)
at System.Net.WebRequest.Create(Uri requestUri)
at System.Xml.XmlDownloadManager.GetNonFileStream(Uri uri, ICredentials credentials)
at System.Xml.XmlDownloadManager.GetStream(Uri uri, ICredentials credentials)
at System.Xml.XmlUrlResolver.GetEntity(Uri absoluteUri, String role, Type ofObjectToReturn)
at System.Xml.XmlTextReader.CreateScanner()
at System.Xml.XmlTextReader.Init()
at System.Xml.XmlTextReader.Read()
at System.Xml.XmlReader.MoveToContent()
at System.Data.DataSet.ReadXml(XmlReader reader, Boolean denyResolving)
at System.Data.DataSet.ReadXml(String fileName)
at WindowsApplication7.Form1.DownloadExtras()There is an invalid character in the given encoding. Line 996, position 20. (c:\windows\microsoft.net\framework\v1.1.4322\Config\machine.config line 996)