Please Help Posting to ReachMail

I am trying to post to ReachMail (to subscribe users), using a simple Ninja form on my WP site.

On Ninja Form, the form has only one field — Email, and a Submit button.
On Ninja Form, the email field has an ID of: ninja_forms_field_22

According to ReachMail, this is all the code needed when processing a Subscribe form:

‘<form name=”signup” method=”post” onSubmit=”return submitIt(this);” action=”https://go.reachmail.net/libraries/form_wizard/process_subscribe.asp&#8221; >
Email address
<input type=”text” id=”rm_email” name=”rm_email” />

<input type=”hidden” name=”my_type” value=”3″ />
<input type=”hidden” name=”form_id” value=”555555″>
<input type=”hidden” name=”list_name” value=”4444444444444444444444″>
<input type=”hidden” name=”list_id” value=”6666666″>
<input type=”hidden” name=”el_list” value=”email”>
<input type=”hidden” name=”page_confirm” value=”http://mysite.org”&gt;
<input type=”hidden” name=”list_fromname” value=””>
<input type=”hidden” name=”list_fromemail” value=””>
<input type=”hidden” name=”list_subject” value=””>
<input type=”submit” name=”Submit” value=”Submit” >
</form>’

So, I did the following within 3rd-party-integration plugin:

1) Set the ‘Submission URL’ = https://go.reachmail.net/libraries/form_wizard/process_subscribe.asp

2) Mapped ninja_forms_field_22 >> rm_email

3) Mapped all of the other items as values

But the form is still failing when I test. Please assist!

https://wordpress.org/plugins/forms-3rdparty-integration/