<div class="col-md-12">
    <h3>{{page_title}}</h3>
    
    <form #taskNewForm="ngForm" (ngSumbit)="onSumbit()" class="col-md-7 no-padding">
        <p>
            <label>Titulo</label>
            <input type="text" class="form-control" name="title" #title="ngModel" [(ngModel)]="task.title" required />
            <span *ngIf="!title.valid && title.touched">El titulo no es correcto.</span>
        </p>
        <p>
            <label>Descripcion</label>
            <textarea class="form-control" name="description" #description="ngModel" [(ngModel)]="task.description" ></textarea>
        </p>
        <p>
            <label>Estado</label>
            <select class="form-control" name="status" #status="ngModel" [(ngModel)]="task.status" required>
                <option value="new">Nueva</option>
                <option value="todo">Para Hacer</option>
                <option value="finished">Finalizada</option>
            </select>
        </p>

        <input type="submit" value="{{page_title}}" class="btn btn-success" [disabled]="!taskNewForm.form.valid" />
    </form>
</div>

<div class="col-md-12">
    <h3>{{page_title}}</h3>
    
    <form #taskNewForm="ngForm" (ngSubmit)="onSubmit()" class="col-md-7 no-padding">
        <p>
            <label>Titulo</label>
            <input type="text" class="form-control" name="title" #title="ngModel" [(ngModel)]="task.title" required />
            <span *ngIf="!title.valid && title.touched">El titulo no es correcto.</span>
        </p>
        <p>
            <label>Descripcion</label>
            <textarea class="form-control" name="description" #description="ngModel" [(ngModel)]="task.description" ></textarea>
        </p>
        <p>
            <label>Estado</label>
            <select class="form-control" name="status" #status="ngModel" [(ngModel)]="task.status" required>
                <option value="new">Nueva</option>
                <option value="todo">Para Hacer</option>
                <option value="finished">Finalizada</option>
            </select>
        </p>

        <input type="submit" value="{{page_title}}" class="btn btn-success" [disabled]="!taskNewForm.form.valid" />
    </form>
</div>

Fix en form error!! De Sumbit a Submit. :-)
Fix en form error!! De Sumbit a Submit. :-)
