We appreciate all your efforts on this plugin!
I've successfully installed and created a default form. When attempting to save edits in the form designer, I am seeing the "whitelist your domain for ModSecurity" message. Can you please briefly describe what in the script triggers this message? Is it the API call to CC? Or, the domain of the website hosting the plugin? I discussed this with our hosting company, but they were unclear exactly which domain needs to be whitelisted and asked me to request more information.
message screenshot: http://screencast.com/t/MXyo35glCbcz