The name of the field gives this away.
You need to make sure that you have checked your extension settings.
I have. Please see the attached screenshot for a shot of the settings.
You need to tell the extension which custom member field contains the interest categories that correspond to constant contact. The extension will then look for that custom field in the registration and pass that along to CC in order to add someone to a list there.
I am aware of that and have read the documentation. Please note I updated the hidden variable to match the mailing_list custom field (that was a typo on my end, it did not fix things). In a second post I will post what a signed up users profile screen looks like (the custom fields)
I have the full signup page code below.
{embed="includes/header"}
{embed="includes/navigation"}
{embed="includes/topbanner"}
<div id="innerpage" class="content">
<div class="sectionbox">
<h1>Register to Accesss Restricted Download, Screencasts and Reports</h1>
{exp:user:register form_name="register_member" form_id="register_member" return="{path=account/register_confirm}" group_id="6|7"}
<h2>Steps to Accessing CTHMIS.com</h2>
<ol>
<li>Fill out the below form and click the "Request Access" button</li>
<li>Allow 1 business day for us to review and activate your account</li>
<li><a href="{path=account}" title="Login Now">Login</a> using the link on the left menu, and you will be able to access restricted downloads and pages</li>
</ol>
<h4>Basic Information</h4>
<p>
<strong>Provide Your Email:*</strong><br />
Your email must be correct in order for your account to be valid<br />
<input type="text" name="username" value="" size="30"/>
</p>
<p>
<strong>Full Name:*</strong><br />
<input type="text" name="screen_name" value="" size="30"/>
</p>
<p>
Job Title:<br />
<input type="text" name="member_title" value="" size="30"/>
</p>
<p>
Agency or Organization Name:*<br />
<input type="text" name="profile_agency" value="" size="30"/>
</p>
<p>
What Continuum of Care do you belong to?<br />
<select name="coc_membership">
{select_coc_membership}
<option value="{coc_membership}">{value}</option>
{/select_coc_membership}
</select>
</p>
<p>
Subscribe to the CT HMIS mailing List?*<br />
<select size="1" name="mailinglist_subscribe" title="CT HMIS - General Announcements">
<option value="Yes">Yes</option>
<option value="No">No</option>
</select>
</p>
<p>
<input type="hidden" name="mailing_list" value="CT HMIS - General Announcements">
</p>
<h4>Choose a Password</h4>
<p>
<strong>New Password:*</strong><br />
<input type="password" name="password" value="" />
</p>
<p>
<strong>Confirm Password Again:*</strong><br />
<input type="password" name="password_confirm" value="" />
</p>
<input type="submit" value="Request Access" />
</p>
{/exp:user:register}
</div><!-- End sectionbox -->
</div>
{embed="includes/footer"}
Click thumbnail to see full-size image