So I'm supposed to fix this? Why? I am not a programmer, and I don't want to mess up this guy's website.
Your answer is not good enough.
This is typical of IT people...they expect everyone to understand what they do and do the same...if your plugin is a WP plugin and the other plugin is a WP plugin, shouldn't they work?
We need to build this landing page ASAP, cannot wait for new releases.