Error connecting to a share folder from java

I am working at an application in java which gets files from a share folder. For 2 days, i got same error trying to connect to the share folder. Until now, i didn't get this error. I dont know what is happened. Please help me. My code:

package ScanPatch;

import java.util.TimerTask;

import Controllers.InterfataController;
import jcifs.smb.NtlmPasswordAuthentication;
import jcifs.smb.SmbFile;

public class MyTask extends TimerTask{

       public MyTask(){

       }

       @Override
       public void run() {

         //System.out.println("Hi see you after 10 seconds");
         for(int i=0;i<InterfataController.getListaCheckbox().size();i++)
            {
            String path="smb://bcr-hqb-w0935/Oracle/Patchuri/" + InterfataController.getListaCheckbox().get(i).getText() +"/";
            NtlmPasswordAuthentication userCred = new NtlmPasswordAuthentication("BCRWAN",
                    "Sebastian.burchidrag", "Parola952491");
            SmbFile smbFile;
            jcifs.Config.setProperty("jcifs.smb.client.disablePlainTextPasswords","false");

            try {
                smbFile = new SmbFile(path, userCred);
                String [] patchuri=smbFile.list();
                if(patchuri.length>1)
                {
                    InterfataController.getListaCheckbox().get(i).setStyle("-fx-text-fill: red;");
                }
                else
                {
                    InterfataController.getListaCheckbox().get(i).setStyle("-fx-text-fill: black;");
                }
            }catch(Exception e)
            {
                e.printStackTrace();
            }
            }



       }

    }

The error is : jcifs.smb.SmbException: 0xC000009A on String [] patchuri=smbFile.list(); this line. The idea is that if a restart my computer, the application will work for the first connection, but only first time, then a i will get this error.