Error xml document (3,63)

[jd789]

There is an error in XML document (3, 63).
   at Autodesk.MapGuide.Studio.Site.Comm.RequestManager.ExecutePendingGetRequest(Operation operation, Type retType)
   at Autodesk.MapGuide.Studio.Site.Comm.RequestManager.GetSiteVersion()
   at Autodesk.MapGuide.Studio.Site.SiteManager.InitializeRequestManager(String siteString, NetworkCredential credential, RequestManager rm, String& siteVersion, Exception& unKnownError)
Inner Exception:
'>' is an unexpected token. The expected token is '"' or '''. Line 3, position 63.
   at System.Xml.XmlTextReaderImpl.Throw(Exception e)
   at System.Xml.XmlTextReaderImpl.DtdParserProxy.System.Xml.IDtdParserAdapter.Throw(Exception e)
   at System.Xml.DtdParser.Throw(Int32 curPos, String res, String[] args)
   at System.Xml.DtdParser.ThrowUnexpectedToken(Int32 pos, String expectedToken1, String expectedToken2)
   at System.Xml.DtdParser.ParseExternalId(Token idTokenType, Token declType, String& publicId, String& systemId)
   at System.Xml.DtdParser.ParseInDocumentDtd(Boolean saveInternalSubset)
   at System.Xml.DtdParser.Parse(Boolean saveInternalSubset)
   at System.Xml.XmlTextReaderImpl.DtdParserProxy.Parse(Boolean saveInternalSubset)
   at System.Xml.XmlTextReaderImpl.ParseDoctypeDecl()
   at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
   at System.Xml.XmlTextReaderImpl.Read()
   at System.Xml.XmlTextReader.Read()
   at System.Xml.XmlReader.MoveToContent()
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderSiteVersion.Read3_SiteVersion()

This is the problem when I try to enter to a map server site, I have a package in the site but I can`t enter

also I can not chose anything when I open the program, I just can only write the site, user ID and password but the error is preventing me to connect I hope an answer