Custom Signup Setting

Hi,

  I used the new customized signup setting for visitors. It works fine, where I can choose my customized form. Now the only problem I have now is how can I incorporate the forgot password function? Previously I use the  wixUser.promptForgotPassword ( ), and a new window pops out for user to reset their password by sending an email. However, if I enable custom signup, the code does not work anymore,  nothing shows up. Can anyone help? Thank you! 

Regards