Good Afternoon, I manage a website (starbudsconsulting.com)

Good Afternoon,

I manage a website (starbudsconsulting.com) for a client via my MultiSite (digitalmakeovers.biz) which has WPMU support.
The Contact Form Plug In, which has worked great for a long time, now gives an error. It says: "Failed: try again later or contact the admin".
Here is the url: http://www.digitalmakeovers.biz/starbuds/contact-us/