NetSuiteService.sessionInfo null after login (WSDL 2.6)

All-
Having strange behavior with the NetSuiteService object and 2.6 beta WS.  Code below works fine with WSDL 2.5 - with WSDL 2.6 all properties of the NetSuiteService object are null after a successful login.  Most of this code was lifted from the ERP example...

Am using .NET framework 2.0.50727

Any shared experience would be greatly appreciated...
Thanks!
Scott

 // constructors          public NSInterface(string Username, string Password, string AccountNumber)          {              // set defaults              _IsAuthenticated = false;              _NetsuiteURL = "https://webservices.netsuite.com/services/NetSuitePort_2_6";              // setup the netsuite service              _Service = new NetSuiteService();              _Service.Timeout = 1000*60*60*2;              _Out = new Logger("info");              // set variables              _Username = Username;              _Password = Password;              _AccountNumber = AccountNumber;          }                    // methods          public void login(bool isAuto)          {              if ( !_IsAuthenticated )              {                  // Check whether this is a forced login as part of another operation                  if ( isAuto )                      _Out.writeLn( "nYou need to first login before invoking this operation ..." );                    // Enable client cookie management. This is required.                  _Service.CookieContainer = new CookieContainer();                  _Service.Url = _NetsuiteURL;                    // Populate Passport object with all login information                  Passport passport = new Passport();                  RecordRef