My database is not working after build and run !

The sqldatabase is working fine when I run in editor but it does not work after build. This problem started happen after updated the unity to 5.6.0f3 from old one. The sql script is as below. I have tired all I can do.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using Mono.Data.Sqlite;
 using System;
 using System.Data;
 
 public class DataStorage : MonoBehaviour
 {
     public V v;
 
     string conn;
     int CheckOk = 0;
 
     private string Answer;
 
     public string Load(string Code)
     {
         if (Code.Length != 0)
         {
             CheckOk = 0;
             int x = Int32.Parse(Code);
             StartCoroutine(Wait());
             IDbConnection dbconn;
             dbconn = (IDbConnection)new SqliteConnection(conn);
             dbconn.Open(); //Open connection to the database.
             IDbCommand dbcmd = dbconn.CreateCommand();
             string sqlQuery = "SELECT Code,Ans FROM Answers";
             //string sqlQuery = "CREATE TABLE IF NOT EXISTS Answers (Code INTEGER NOT NULL PRIMARY KEY, Ans VARCHAR(40))";
             dbcmd.CommandText = sqlQuery;
             IDataReader reader = dbcmd.ExecuteReader();
             while (reader.Read())
             {
                 int CodeM = reader.GetInt32(0);
                 string Ans = reader.GetString(1);
                 if (x == CodeM)
                 {
                     Answer = Ans;
                     CheckOk = 1;
                     break;
                 }
             }
             if (CheckOk == 0)
             {
                 Answer = "I don't know what you mean.";
             }
             reader.Close();
             reader = null;
             dbcmd.Dispose();
             dbcmd = null;
             dbconn.Close();
             dbconn = null;
         }
         else
         {
             Answer = "I don't know what you mean.";
         }
         return (Answer);
     }
 
     public void Save(string Code,string Ans)
     {
         int x = Int32.Parse(Code);
         Debug.Log(x);
         StartCoroutine(Wait());
         IDbConnection dbconn;
         dbconn = (IDbConnection)new SqliteConnection(conn);
         dbconn.Open(); //Open connection to the database.
         IDbCommand dbcmd = dbconn.CreateCommand();
         string sqlAdd = "INSERT INTO Answers VALUES('" + x + "','" + Ans + "')";
         dbcmd.CommandText = sqlAdd;
         IDataReader reader = dbcmd.ExecuteReader();
         reader.Close();
         reader = null;
         dbcmd.Dispose();
         dbcmd = null;
         dbconn.Close();
         dbconn = null;
     }
 
     private IEnumerator Wait()
     {
         conn = "URI=file:" + Application.dataPath + "/StreamingAssets/Memory.db"; //Path to database.
         v.SystemLogEditor(conn);
         Debug.Log(conn);
         yield return conn;
     }
 
 }

This is on editor.

This is after build. As you can see, there is no reply log in system log. Please help me.