Why I'm not receiving autoresponders?

I have created my Auto Response, sent myself a 'Test' and it seems fine.  However webcast registrants are not receiving the Auto Response.  The registration form and thank-you page work fine.

This is urgent.

Thanks,

Beth 

I checked your form and the problem is in recipient field, currently, it's 'Title' and it should be email:

I changed that for you, so please test and let us know how it worked.

Thank you!