Problem with Maintaining Session

I was successfully logging in, adding records, deleting records, searching etc.  Everything was working fine.  Now all of a sudden things are broken.  I now get an error when I try to do anything after logging in (the login itself is fine).  I created a simple Java class that just logs in and logs out - just to make it easier to play with this problem.  The log out says that I'm not logged in.  I was getting the same behavior trying to add a record after logging in.  Any ideas?

package com.wjbradley.webservices.netsuite;    import java.rmi.RemoteException;    import com.netsuite.webservices.platform.core_2008_1.Passport;  import com.netsuite.webservices.platform.core_2008_1.RecordRef;  import com.netsuite.webservices.platform.faults_2008_1.InsufficientPermissionFault;  import com.netsuite.webservices.platform.faults_2008_1.InvalidAccountFault;  import com.netsuite.webservices.platform.faults_2008_1.InvalidCredentialsFault;  import com.netsuite.webservices.platform.faults_2008_1.InvalidSessionFault;  import com.netsuite.webservices.platform.faults_2008_1.InvalidVersionFault;  import com.netsuite.webservices.platform.faults_2008_1.UnexpectedErrorFault;  import com.netsuite.webservices.platform.messages_2008_1.SessionResponse;  import com.netsuite.webservices.platform_2008_1.NetSuitePortType;  import com.netsuite.webservices.platform_2008_1.NetSuiteServiceLocator;    public class LoginLogout {            private static NetSuiteServiceLocator service = new NetSuiteServiceLocator();      private static NetSuitePortType port;          public static void main(String[] args) {          System.out.println("main");          LoginLogout util = new LoginLogout();          util.login();          util.logout();      }                  public void login() {                    service.setMaintainSession(true);            Passport passport = new Passport();          passport.setEmail("xxxxxx");          passport.setPassword("xxxxxx");          passport.setAccount("xxxxxx");            RecordRef role = new RecordRef();          role.setExternalId("x");          passport.setRole(role);            SessionResponse response;          try {              port = service.getNetSuitePort();              response = port.login(passport);              if (!response.getStatus().isIsSuccess()) {                  throw new Exception("error");              }          } catch (InvalidAccountFault e) {              // TODO