[allowChoose] = "true" not working

[vladimirheredia]

I'm implementing this with Angular 7, i have added [allowChoose]="true" to the component and it doesn't show me the next page as shown in the documentation. Maybe i'm doing something wrong. this is my configuration..

<ngx-braintree
[clientTokenURL]="my_client_url "
[createPurchaseURL]="my_url"
(paymentStatus)="onPaymentStatus($event)"
[showCardholderName]="true"
[allowChoose]="true"
>