Way too many errors in the code…

I just downloaded this to test it out since OpenX screwed everyone. I am testing on my development environment and I have WP_DEBUG enabled. This plugin throws errors on numerous pages. On activations I get an undefined constant error. On ad creation (which has no help on how to use) when I submit the ad to publish it I get many undefined variable notices with a few getting property of a non-object. I would love to use this but this script would just slow my the system with this many errors. I imagine they are in all parts of the plugin.

This plugin seems useful so please fix these minor issues.

http://wordpress.org/extend/plugins/adpress/