[Plugin: WP-DailyBooth] Error with php tag

I’m actually using version 2.9.2. I’m trying to use the php tag for this plugin and I keep getting this error:

Fatal error: Call to a member function images() on a non-object in /home/—/—/wp-content/themes/awesome/header.php on line 58

Thanks for any help you can offer.

http://wordpress.org/extend/plugins/wp-dailybooth/