sf_widget_constantcontact__1_submit is not defined

This plugin is awesome because it’s lightweight 🙂

I’m struggeling to make it work inside a template file though.

I’m calling

<?php the_widget( 'sf_widget_constantcontact', 'grp=General%20Interest&btn=SUBMIT&msg=Thanks!' ); ?>

but the form generated will throuw this exception:

sf_widget_constantcontact__1_submit is not defined

See here: http://jsfiddle.net/9qTq8/1/

Any ideas how to solve this? Embedding as a widget works…

http://wordpress.org/plugins/constant-contact-widget/