Installation of E mail Auto Responder plugin to a Hebrew wordpress site

The site is [[login to view URL]][1] The site is hosted on Blue host, uses Weaver Theme (2010 Weaver 1.4) and Wordpress in Hebrew 3.0.2. I wish to send an automatic e mail to every person who leaves a comment on the site. I should be able to change the message whenever I choose. There are 2 plugins that I found that give this possibility: WP Comment Auto Responder Thank Me Later I can't make them work. The freelancer should make one of the plugins function, or suggest another solution. The solution should stand future upgrades of wordpess, the theme and the plugin. The freelancer should: Have experience in Wordpress.