Error crating the Web Proxy specified in the 'system.net/defaultProxy' configuration
 

These are the 2 messages I get when I start EQ2 Auto Updater (Version 1.2.3)

Unknown Error:
Error crating the Web Proxy specified in the 'system.net/defaultProxy' configuration section.

Error Opening Database File: mscorlib
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize)
at System.Xml.XmlDownloadManager.GetStream(Uri uri, ICredentials credentials)
at System.Xml.XmlUrlResolver.GetEntity(Uri absoluteUri, String role, Type ofObjectToReturn)
at System.Xml.XmlTextReaderImpl.OpenUrlDelegate(Object xmlResolver)
at System.Threading.CompressedStack.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup( TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.CompressedStack.Run(CompressedStack compressedStack, ContextCallback callback, Object state)
at System.Xml.XmlTextReaderImpl.OpenUrl()
at System.Xml.XmlTextReaderImpl.Read()
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 EQ2MAPUpdater.MainWindow.DownloadUpdates()Could not find file 'C:\Program Files\EQ2MAP Updater\cache\updates_list.xml'.

There seems to be something wrong with your proxy settings, but i have no clue how to fix it :(

I get the exact same error. I've tried uninstalling/reinstalling, I made sure I had the net framework 1.1, I turned firewall off and on. No joy so far. I'll keep trying.

Ok it looks like the program is trying to find updates_list.xml, but it's not there.

Yup. Copied the updates_list.xml from my other computer and it worked.

Ok, it didn't work. It now acts like it's updating but I get no files.

Ok so version 1.2.3 works on my XP laptop but not the Vista desktop.

You can try this updater instead:
http://www.eq2interface.com/download...APUpdater.html