http://wordpress.org/support/topic/a-note-from-the-developer
For those of you who the plugin doesn’t work then until we have an update available I’m sorry we can’t help you. For those of you posting ideas and suggestions, keep it up, we’ll review this forum when it comes to updating the plugin.
We have a new version of the plugin that we’re planning on releasing. We’re currently looking for a few people to test the plugin: if you’re interested, please email hello@clockworksms.com and we’ll send you the update.