[Plugin: Car Dealer Inventory Page Display] Will the Car Dealer Plugin shortcode [cardealer] work ou

For some reason when I try to place the shortcode for the Car Dealer Inventory plugin inside my template it shows up as the shortcode text [cardealer] on the page instead of pulling in the information. I’ve read that this might be due to the plugin not supporting shortcode outside of the WordPress posting area. Does anyone have experience with this plugin, or can you tell me how I might get the shortcode to work within my template code?

This is what I’m using:
<?php echo do_shortcode('[cardealer]'); ?>

http://wordpress.org/extend/plugins/car-inventory-page-display-wordpress-plugin/