Subscription: widget problem

Hi there. I already have a ticket on Wysija helpdesk, no luck so far, that’s why I’m here. I’ve seen that some people have had the same issue, but I couldn’t find any solution to my problem.

I remember it was working fine on my site. Not anymore.
I checked but I couldn’t find any conflict with other widgets.

The problem:

When entering a new email for sucription I receive the following error messages:

•textStatus:error
•errorThrown:No Transport
•responseText:undefined

I have tested on several browsers. Same thing. Could someone help asap, Wysija is really great and perfect for my needs, but with this issue….
Thanks!

media.unmikonline.org

ps: I have updated and I am using the very last version.

http://wordpress.org/extend/plugins/wysija-newsletters/