I've tried to implement your plugin without success.
I'm using Contact Form 7 and it doesn't work. At first I tried supplying the Contact Form 7 id to Leads global settings, then I tried injecting an ID to the actual form (CF7 adds the id to a wrapping DIV). Both ways, it doesn't work.
Could you provide a setup guide / process / walkthrough to get it working?
You have a cool layout. It's too bad you're not providing the information for setting up Leads with the forms plugin you recommend.