Angular2 is not hitting Api - angular2-forms

Question

Here im trying to hit my Api from ang2 why its not hitting. Even my Fiddler also not caughing traffic please check my code
constructor(private fb: FormBuilder, private _http: Http) {
_http.get('http://localhost:40039/Api/Home/GetEmp').subscribe(result => {
this.ctstArrayList = result.json();
}
)}
doSubmit(): Observable<Customer> {
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this._http.post('http://localhost:40039/Api/Home/SaveEmp', JSON.stringify(this.custobj), options)
.map(this.extractData)
.catch(this.handleError);
}
This is my html code here i implement ngtoch and other some validation
Html code
<form class="form-horizontal" novalidate (ngSubmit)="doSubmit()" [formGroup]="customerForm">
<fieldset>
<div class="form-group" [ngClass]="{'has-error': (customerForm.get('EmpName').touched ||
customerForm.get('EmpName').dirty) &&
!customerForm.get('EmpName').valid }">
<label for="name">Name</label>
<input type="text" class="form-control" formControlName="EmpName" [(ngModel)]="custobj.EmpName" />
<span>Hell{{custobj.EmpName}}</span>
<span class="help-block" *ngIf="(customerForm.get('EmpName').touched ||
customerForm.get('EmpName').dirty) &&
customerForm.get('EmpName').errors">
<span *ngIf="customerForm.get('EmpName').errors.required">
Please enter your first name.
</span>
<span *ngIf="customerForm.get('EmpName').errors.minlength || customerForm.get('EmpName').errors.maxlength">
The first name must be longer than 3 and max6 characters.
</span>
</span>
</div>
<button type="submit" class="btn btn-success btn-block" (click)="doSubmit(custobj)" [disabled]="!(customerForm.valid)">Submit</button>