Issue with Facebook Setup, API Error Code 100. Error Message 'link' is invalid

Hi Mike,

First wanted to thank you for a great component. ParaInvite seems to be quite fully featured.

I'm having issues setting up the facebook developer app. I have created the app and I believe I have setup everything according to your setup guide: https://www.simbunch[...]ll=&start=8

However when I go to invite friends, I get an error code 100 that reads as the following:
API Error Code: 100
API Error Description: Invalid parameter
Error Message: 'link' is invalid.

I am working on a development version of my site, http:///dev1/