How to use Map() and postURL()

How to use Map() and postURL()

I have read the ZOHO Creator help guide and attempted to make a form post to an external application and failed miserably. I think it's me not being calibrated on how all the parts fit together. For the reference, the api is from SmarterMail . I'm just going to be lazy and post the form info below and hope someone with a better brain can help

The form target to post to is
http://xxxxxxxxxx.org/Services/svcMailListAdmin.asmx/AddSubscriber

The form fields are all text:



AuthUserName
AuthPassword
DomainName

ListName
Subscriber

Thank You