Angular2 subject not subscribing in the parent component

Angular2 Subject

Folder sturcture:

- Datapanel
  - datapanel.component.ts
  - datapanel.html
  - datapanel.module.ts
  - DataConnector
    - dataconnector.component.ts
    - database-information.service.ts
    
    
// parent component    
export class DatapanelComponent implements OnInit, OnDestroy {
  connectedDBNames = [];
  private subscription: Subscription;

  constructor(private _databaseInfo:DatabaseInformationService) { }

  ngOnInit() {
    this.subscription = this._databaseInfo.notifyObservable$.subscribe(
        data => {
          console.log(data);
          this.connectedDBNames.push({'name': data, 'checked': false});
        }
      );
  }
}

// common service
export class DatabaseInformationService {

  private addDatabaseToDataPanel = new Subject<any>();
  notifyObservable$ = this.addDatabaseToDataPanel.asObservable();

  constructor(private http: Http) {
  }
  
  public addDataBaseToDataPanel(db_name){
    this.addDatabaseToDataPanel.next(db_name);
    console.log(db_name);
  }
}

// child component
export class DatabaseConnectionComponent implements OnInit {

  constructor(public databaseInfo: DatabaseInformationService) {}
  
  saveDatabase(db_name: any, uri: any) {
    this.databaseInfo.addDataBaseToDataPanel(db_name);
  }
  
}  

// datapanel.module.ts
@NgModule({
  imports: [
    CommonModule,AccordionModule,FormsModule

  ],
  declarations: [DatapanelComponent, DatabaseConnectionComponent],
  exports :[DatapanelComponent,  DatabaseConnectionComponent],
  providers:[DatabaseInformationService]

})

Its because of same name addDataBaseToDataPanel inside common service. Apply changes as below :

// common service
export class DatabaseInformationService {

  private addDatabaseToDataPanel = new Subject<any>();
  notifyObservable$ = this.addDatabaseToDataPanel.asObservable();

  constructor(private http: Http) {
  }

  public notifyDataBaseToDataPanel(db_name){
    this.addDatabaseToDataPanel.next(db_name);
    console.log(db_name);
  }
}

// child component
export class DatabaseConnectionComponent implements OnInit {

  constructor(public databaseInfo: DatabaseInformationService) {}

  saveDatabase(db_name: any, uri: any) {
    this.databaseInfo.notifyDataBaseToDataPanel(db_name);
  }

}