contact form does not send despite correct captcha

I have your contact form in all pages. Today I randomly decided to test. Notivced that it doesn't ever send messages. This is hurting business. I used to get 2-5 messages every week. For many months now I haven't received any business contact. The Free contact forms worked better. Can you take a look? Try the form here http://www.seas.com.sg/smtp-relay-service-for-bulk-emails-singapore/