HELP Object refrence not set to an instant of an object

public MySqlConnection connection;
       public void DBConnect()
       {
           Initialize();
       }
       private void Initialize()
       {
           string datasource = "";
           string initialcatalog = "";
           string uid = "";
           string pwd = "";
           string connectionstring;
           connectionstring = "SERVER='" + datasource + "';DATABASE='" + initialcatalog + "';UID='" + uid + "';PASSWORD='" + pwd + "'";
           connection = new MySqlConnection(connectionstring);
       }
       private bool OpenConnection()
       {
           try
           {
               connection.Open();
               return true;
           }
           catch (Exception ex)
           {
               switch (ex.Number)
               {
                   case 0:
                       System.Windows.Forms.MessageBox.Show("Cannot Connect to server. Contact administrator");
                       break;
                   case 1045:
                       System.Windows.Forms.MessageBox.Show("Invalid Username/Password for mysql, Please try again");
                       break;
               }
               return false;
           }
       }