ng2-boostrap errore di implementazione datePicker - angolare, ng2-bootstrap

Implemento ng2-bootstrap datePicker nella mia app angular 2, ma ho dovuto affrontare alcuni tipi di errore dei moduli e non capisco quale sia il problema alla base. Per favore aiutatemi.

module.ts

import { DatepickerModule } from "ng2-bootstrap/datepicker";

@NgModule({
imports: [
...........
DatepickerModule
...........
],
declarations: [
.....
.....
]
})
export default class Modules {
}

file html

<div>
<datepicker></datepicker>
</div>

errore

"datepicker" is not a known element:
1. If "datepicker" is an Angular component, then verify that it is part of this module.
2. If "datepicker" is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the "@NgModule.schema" of this component to suppress this message. ("<div class="form-group"><div>
[ERROR ->]<datepicker></datepicker>
<!--<datepicker [expanded]="true" class="danger"-"): AddCustomer@49:26
Can"t bind to "expanded" since it isn"t a known property of "datepicker". ("                              <div>
<datepicker [ERROR ->][expanded]="true" class="danger"
form"): AddCustomer@212:64
"datepicker" is not a known element:

risposte:

hai incluso nel tuo app.module.ts il lib di Boostrap? come questo:

// ... other imports
import { NgbModule } from "@ng-bootstrap/ng-bootstrap";
// ... other imports


@NgModule({
imports: [
BrowserModule,
routing,
HttpModule,
JsonpModule,
ToasterModule,
CoolHttpModule,
SlimLoadingBarModule.forRoot(),
NgbModule.forRoot() //need to be import also here
]