Angular 2 RC-4 forms, Type 'FormGroup' is not assignable to type 'typeof FormGroup'
<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>