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According to our system, chocolady.biz is not a domain bought from Yola, but an external domain that you have pointed to your Yola website. It looks like your domain has expired with your other registrar, and as we don't manage the domain, you will need to contact them to find out what the problem is.
On your end everything seems to be fine. Your Yola Silver hosting package which allows you to point external domains is still up and running and will only expire in May 2013.