[Plugin: WP-EMail] Not sending with WP3.1.2

(this is a repeat of http://wordpress.org/support/topic/312-not-sending?replies=1 with proper title)

I just moved a new client’s site to our server and upgraded them from WP 2.6 to 3.1.2. No changes to the template.

They were set up to use your plugin. I can’t get it to mail anything…. Just sits there and spins.

PHP is throwing an error:

PHP Fatal error: Cannot redeclare email_textdomain() (previously declared in /path/to/site/content/wp-content/plugins/wp-email/wp-email.php:55) in /path/to/site/content/wp-content/plugins/wp-email/wp-email.php on line 56, referer: http://holoscollaborative.com/portfolio/emailpopuppage/

Any ideas/pointers?