EntryPointNotFoundException: sqlite3_next_stmt in Unity

help!!.. I don't seem to find what error this is.. I tried surfing the web for answers but to no avail..

I already have the System.Data.dll, Mono.Data.Sqlite.dll, sqlite3.def and sqlite3.dll into Assets/Plugins

This is the error:

EntryPointNotFoundException: sqlite3_next_stmt
Mono.Data.Sqlite.SQLiteBase.ResetConnection (Mono.Data.Sqlite.SqliteConnectionHandle db)
Mono.Data.Sqlite.SQLiteBase.CloseConnection (Mono.Data.Sqlite.SqliteConnectionHandle db)
Mono.Data.Sqlite.SqliteConnectionHandle.ReleaseHandle ()
System.Runtime.InteropServices.CriticalHandle.Dispose (Boolean disposing) (at strong text/Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.InteropServices/CriticalHandle.cs:56)
System.Runtime.InteropServices.CriticalHandle.Dispose () (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.InteropServices/CriticalHandle.cs:42)
Mono.Data.Sqlite.SQLite3.Close ()
Mono.Data.Sqlite.SqliteConnection.Close ()
(wrapper remoting-invoke-with-check) Mono.Data.Sqlite.SqliteConnection:Close ()
Mono.Data.Sqlite.SqliteConnection.Open ()
SampleDB.Start () (at Assets/Scripts/SampleDB.cs:17)

My Program:

void Start () {
    string conn = "URI=file:" + Application.dataPath +   "/LandslidePredDB.s3db"; //Path to database.
    IDbConnection dbconn;
    dbconn = (IDbConnection) new SqliteConnection(conn);
    dbconn.Open(); 
    IDbCommand dbcmd = dbconn.CreateCommand();
    string sqlQuery = "SELECT Rain_ID, Rain_Type, Rain_Desc " + "FROM Rain_DB";
    dbcmd.CommandText = sqlQuery;
    IDataReader reader = dbcmd.ExecuteReader();
    while (reader.Read())
    {
        int value = reader.GetInt32(0);
        string name = reader.GetString(1);
        string rand = reader.GetString(2);

        Debug.Log( "value= "+value+"  name ="+name+"  random ="+  rand );
    }
    reader.Close();
    reader = null;
    dbcmd.Dispose();
    dbcmd = null;
    dbconn.Close();
    dbconn = null;
  }
}