Angular 2 service property values undefined in my lazy loaded modules -

i have several properties in service share in other lazy loaded modules

my service defined as:

@injectable() export class appsettingsservice {    private _deviceid: string;   private _accountid: string;    constructor() { }    initialise(): promise<any> {       if(this.getdeviceidfromlocalstorage() && this.getaccountidfromlocalstorage()) {       return promise.resolve(errorcode.existing_user);     }     }    setapplicationid(applicationid): void {     this._deviceid = applicationid;   }    getapplicationid(): string {     return this._deviceid;   }    setaccountid(accountid): void {     this._accountid = accountid;   }    getaccountid(): string {     if(typeof this._accountid !== 'undefined') {       return this._accountid;     } else {       return '0';     }   }     public getdeviceidfromlocalstorage(): boolean {     let deviceid = localstorage.getitem(appkeys.device_id);      if((typeof deviceid !== 'undefined') && (deviceid !== null)){       this.setapplicationid(deviceid);       return true;     } else {       return false;     }   }    public getaccountidfromlocalstorage(): boolean {     let accountid = localstorage.getitem(appkeys.account_id);      if((typeof accountid !== 'undefined') && (accountid !== null)){       this.setaccountid(accountid);       return true;     } else {       return false;     }   }    } 

and declare service in shared module

import { ngmodule, modulewithproviders } '@angular/core'; import { commonmodule } '@angular/common'; import { formsmodule } '@angular/forms'; import { routermodule } '@angular/router'; import { logocomponent } './logo.component'; import { appsettingsservice } './app-settings.service';  @ngmodule({   imports: [     commonmodule   ],   declarations: [     logocomponent   ],   exports: [     commonmodule,     formsmodule,     routermodule,     logocomponent   ] })  export class sharedmodule {   static forroot(): modulewithproviders {     return {       ngmodule: sharedmodule,       providers: [ appsettingsservice ]     }   } } 

all data loads fine in core app. when navigate different lazy loaded module, , call getapplicationid() or getaccountid() properties _deviceid , _accountid undefined.

in lazy loaded module, import shared module

import { ngmodule } '@angular/core'; import { commonmodule } '@angular/common'; import { httpmodule } '@angular/http'; import { sharedmodule } '../shared/shared.module'; <excluded clarity>  @ngmodule({   imports: [     commonmodule,     httpmodule,     sharedmodule.forroot(),   ],   declarations: [     <excluded clarity>    ],   providers: [     <excluded clarity>    ] }) export class advertisementmodule { } 

in component, import service

import { appsettingsservice } '../shared/app-settings.service’; 

and reference in constructor

constructor(private _router: router, private _appservice: appsettingsservice) { } 

what missing or not possible persist values in service in way? i'm using angular-cli webpack 2.1.0-beta.25