The Form Builder Wizard only allows you to use Like Entry with Password form elements. To verify the email address entry, you will need to add the like entry validation after the form has been created by the Form builder wizard.
In the form builder wizard, add the email address form element and the Confirm Email address form element to the form design.
after the form has been created, open the server behavior panel (Window -> Server Behaviors). In the Server Behaviors list,double click the Server Validations server behavior to edit it.
from the validation type list, select Like Entry. For the Server Variable, click the lightning bolt icon and select the email address form element. Then click the plus button to add the new validation to the list. you will be prompted to select the comparison variable, this time select the Confirm Email element.