Error when calling NotificationsService from Service class.

[pacoita]

I want to call the NotificationsService from a centralized location (Angular Service class), but when the NotificationsService is injected in the constructor class, I get the following error:

Error: Can't resolve all parameters for NotificationWrapService: (?).
    at SyntaxError.ZoneAwareError (http://localhost:4200/polyfills.bundle.js:3401:33)
    at SyntaxError.BaseError [as constructor] (http://localhost:4200/vendor.bundle.js:85542:16)
    at new SyntaxError (http://localhost:4200/vendor.bundle.js:6513:16)
    at CompileMetadataResolver._getDependenciesMetadata (http://localhost:4200/vendor.bundle.js:21339:31)
    at CompileMetadataResolver._getTypeMetadata (http://localhost:4200/vendor.bundle.js:21214:26)
    at CompileMetadataResolver._getInjectableMetadata (http://localhost:4200/vendor.bundle.js:21202:21)
    at CompileMetadataResolver.getProviderMetadata (http://localhost:4200/vendor.bundle.js:21444:40)
    at http://localhost:4200/vendor.bundle.js:21402:49
    at Array.forEach (native)
    at CompileMetadataResolver._getProvidersMetadata (http://localhost:4200/vendor.bundle.js:21369:19)
    at CompileMetadataResolver.getNgModuleMetadata (http://localhost:4200/vendor.bundle.js:21053:50)
    at JitCompiler._loadModules (http://localhost:4200/vendor.bundle.js:58970:64)
    at JitCompiler._compileModuleAndComponents (http://localhost:4200/vendor.bundle.js:58930:52)
    at JitCompiler.compileModuleAsync (http://localhost:4200/vendor.bundle.js:58896:21)
    at PlatformRef_._bootstrapModuleWithZone (http://localhost:4200/vendor.bundle.js:44146:25)

I use angular-cli (1.0.0) that uses webpack:

app.module.ts

...
@NgModule({
  declarations: [...],
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    SimpleNotificationsModule.forRoot(),  //  <--- HERE
    AppRoutingModule,
    MaterialModule,
    AngularFireModule.initializeApp(firebaseConfig),
    FlexLayoutModule.forRoot()
  ],
  providers: [...],
  bootstrap: [AppComponent]
})

My service NotificationWrapService.ts

import { NotificationsService } from 'angular2-notifications';

export class NotificationWrapService {

    constructor(private toaster: NotificationsService) {  }  // When the service injected I get the error

    success = (title: string, message: string): void => {
        this.toaster.success(title, message);
    }
}

Am I importing it in a wrong way inside the service? If I call the NotificationsService directly inside a component, it works fine.

[Chealer]

Which version do you use?

We don't really have such a wrapper class, but using 2.0.0 I am unable to notify from our AuthRestService, which has NotificationsService injected and calls: this.notificationsService.error('Erreur', message);

We have no problem with injection, there is no error neither compiling nor when the statement runs, but no message displays, while it works when the same statement is in components.