title: Angular 2 RC-4 forms, Type 'FormGroup' is not assignable to type 'typeof FormGroup'
body: <p>I am having some trouble with Angular 2 forms, I succesfully implemented a few forms in my project and when I try to add this one, i get and error from my Angular Cli: 
  <strong><code>Type 'FormGroup' is not assignable to type 'typeof FormGroup'.</code></strong></p>
  
  <p>Anyone met with this ?</p>
  
  <p>Here is my component code: </p>
  
  <pre><code>import { Component } from '@angular/core';
  import {AngularFire} from "angularfire2/angularfire2";
  
  import {DataService} from "../../shared/data.service";
  import {FormGroup, FormBuilder, Validators} from "@angular/forms";
  
  @Component({
    moduleId: module.id,
    selector: 'tm-address-book',
    templateUrl: 'address-book.component.html',
    styleUrls: ['address-book.component.css'],
    providers: [DataService]
  })
  export class AddressBookComponent {
    myAddressForm = FormGroup;
    addressbook: Array&lt;any&gt;;
  
    constructor(private af: AngularFire,
            private formBuilder: FormBuilder,
            private dataService: DataService) {
    af.database.list('Addressbook').subscribe(address =&gt; {
      this.addressbook = address;
      console.log(this.addressbook);
    });
  
    this.myAddressForm = formBuilder.group({
      'companyName': ['', Validators.required],
      'street': ['', Validators.required],
      'city': ['', Validators.required],
      'postCode': ['', Validators.required],
    })
  }
  </code></pre>
  
  <p>And here is the html form code:</p>
  
  <pre><code>&lt;form [formGroup]="myAddressForm" (ngSubmit)="onSubmit()"&gt;
              &lt;div class="form-group"&gt;
                &lt;input type="text" class="form-control" formControlName="companyName" name="companyName" placeholder="Nazwa firmy"&gt;
              &lt;/div&gt;
              &lt;div class="form-group"&gt;
                &lt;input type="text" class="form-control" formControlName="street" placeholder="Ulica"&gt;
              &lt;/div&gt;
              &lt;div class="form-group"&gt;
                &lt;input type="text" class="form-control" formControlName="city" name="city" placeholder="Miejscowość"&gt;
              &lt;/div&gt;
              &lt;div class="form-group"&gt;
                &lt;input type="text" class="form-control" formControlName="postCode" name="postCode" placeholder="Kod pocztowy"&gt;
              &lt;/div&gt;
              &lt;button type="submit" class="btn btn-success waves-effect waves-light" data-toggle="collapse" data-target="#collapse1"&gt;
                Dodaj
              &lt;/button&gt;
            &lt;/form&gt;
  </code></pre>