Mail chimp perch resubscribe email not working - Urgent !!!

Hi,

I have an urgent issue to fix... I need to deploy code today itself... please help...

I had integrated mail chimp with my staging site and every thing was working fine. When I moved my code to production, its not working.

I am unable to resubscribe from perch now. User don't get confirm email from mail chimp.

Here is my code

<perch:form id="subscribe" app="perch_mailchimp" double-optin="true" send-welcome="false" novalidate="novalidate">
        <h2>Unsubscribe</h2>
        <div class="field subcribeText">
            <a href="https://caldolor.us7.list-manage.com/unsubscribe?u=b45fd0d5879a653cb6b96cfa9&id=72d618781d" target="_blank">Click here to unsubscribe from updates on the eCompendium and on the Seqirus pain portfolio (Caldolor, Palexia, and Versatis)</a>
        </div>
        <h2>Resubscribe</h2>
        <div class="field subcribeText">
            <p>If you wish to resubscribe to updates on the eCompendium and on the Seqirus pain portfolio (Caldolor, Palexia, and Versatis), complete the fields below</p>
        </div>
        <br>
        <div class="field">
            <perch:label for="first_name">First name</perch:label>
            <perch:input type="text" id="first_name" required="true" label="First name" class="textbox" mailer="FNAME"/>
            <perch:error for="first_name" type="required"><span class="requiredMessage">Please enter your name</span></perch:error>
        </div>
        <div class="field">
            <perch:label for="last_name">Last name</perch:label>
            <perch:input type="text" id="last_name" required="true" label="Last name" class="textbox" mailer="LNAME"/>
            <perch:error for="last_name" type="required"><span class="requiredMessage">Please enter your name</span></perch:error>
        </div>
        <div class="field">
            <perch:label for="email">Email</perch:label>
            <perch:input type="email" id="email" required="true" label="Email" class="textbox" placeholder="you@company.com" helper="PerchMembers_Members::check_email_exists" mailer="email"/>
            <perch:error for="email" type="required"><span class="requiredMessage">Please enter your email address</span></perch:error>
        </div>

        <br>
        <perch:input type="submit" id="btnsubmit" value="RESUBSCRIBE >" class="button large"/>
        <perch:input type="hidden" value="1" id="confirm" mailer="confirm_subscribe" />
        <br><br>

        <perch:success>
            <div class="success bigMargin">
                <p>An email has been sent to you. Please confirm to subscribe</p>
            </div>
        </perch:success>
        <perch:error>
            <div class="error bigMargin">
                <p>There was an unexpected error.</p>
            </div>
        </perch:error>
</perch:form>

1. Here is file path... perch\addons\apps\perch_members\templates\members\forms

2. I can see my page loading using perch_member_form('subscription.html');

3. I have updated to latest perch version

4. Can see subscribers in mail chimp as well as in perch mailChmip app...

5. I have deleted webhooks and set them again, imported subscribers from mail chimp.

6. Re-checked the list ID and mailchimp api key.

7. Deleted mailChimp table in perch also

8. Remove mailchimp secret key from perch_setting table also

9. Checked the mailer tags as per documentation.

10. also i have verified domain and authenticated DKIM in mailChimp...

11. Debug msgs don't show any change after submitting form

Debug Message
[1] SELECT * FROM perch2_members_sessions WHERE sessionID='09c367d2fa2b3516b06254767d55a4d35e3250ff' AND sessionHttpFootprint='a73ffe11e980d7d9b90a0369c6dd9afbb0d42f95' AND sessionExpires>'2016-04-01 01:25:52' LIMIT 1
User is logged in
[1] SELECT * FROM perch2_pages WHERE pagePath='/perch/core/runway/start.php' LIMIT 1
[25] SELECT p.pagePath, pr.routePattern, pr.routeRegExp, p.pageTemplate FROM perch2_pages p LEFT JOIN perch2_page_routes pr ON p.pageID=pr.pageID ORDER BY pr.routeOrder ASC, p.pagePath ASC
Matched page: /subscription, so not using routes.
Using master page: /templates/pages/masterseries/subscription.php
[26] SELECT DISTINCT settingID, settingValue FROM perch2_settings WHERE userID=0
[1] SELECT COUNT(*) FROM perch2_members WHERE memberEmail=abcd@gmail.com'
[1] SELECT * FROM perch2_pages WHERE pagePath='/subscription' LIMIT 1
Using template: /templates/pages/attributes/seo.html
[2] SELECT regionKey, regionHTML FROM perch2_content_regions WHERE regionPage='/subscription' OR regionPage='*' ORDER BY regionPage DESC
Using template: /addons/apps/perch_members/templates/members/forms/subscription.html
Request time: 0.7281
Process time: 0.7274
Memory: 4.3246

1. Diagnostics reports

SUMMARY INFORMATION

Perch Runway: 2.8.27, PHP: 5.4.38, MySQL: mysqlnd 5.0.10 - 20111026 - $Id: c85105d7c6f7d70d609bb4c000257868a40840ab $, with PDO
Server OS: Linux, cgi-fcgi
Installed apps: content (2.8.27), assets (2.8.27), categories (2.8.27), collection_14 (2.8.27), collection_12 (2.8.27), collection_17 (2.8.27), collection_10 (2.8.27), perch_forms (1.8.3), collection_8 (2.8.27), perch_mailchimp (2.0.1), collection_9 (2.8.27), perch_members (1.1)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_members', 'perch_forms', 'perch_mailchimp' ); ?>
PERCH_LOGINPATH: /perch
PERCH_PATH: /home/calmaster/public_html/perch
PERCH_CORE: /home/calmaster/public_html/perch/core
PERCH_RESFILEPATH: /home/calmaster/public_html/perch/resources
Image manipulation: GD
PHP limits: Max upload 2M, Max POST 8M, Memory: 32M, Total max file upload: 2M
F1: 2edba60ed1f613d6dd804feb202456a2
Resource folder writeable: Yes
DOCUMENT_ROOT: /home/calmaster/public_html
HTTP_HOST: www.xxxxxx.com.au
REQUEST_URI: /perch/core/settings/diagnostics/
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php

Few points to note: 1. Allow unsubscribe from link or from link inside my site. But if i unsubscribe again ... not error. 2. Similarly give success msg but no confirmation mail sent to user... 3. Saw 212 List_InvalidUnsubMember in mailChimp API call log

Last 24 hours of API calls About Date/Time

Date/Time   Result  Throttled?  Source IP   Method  Format  Exec Time   User Agent  Ver Response
2016-04-01 01:28:58 GMT     nope    202.129.244.131 lists/subscribe json    0.112s  PerchCMS/2.0    2.0 (212) List_InvalidUnsubMember
2016-04-01 01:25:52 GMT     nope    202.129.244.131 lists/subscribe json    0.117s  PerchCMS/2.0    2.0 (212) List_InvalidUnsubMember

I doubt the msg is getting received my mail chimp... Some configuration issue..

Suggestions please...