sofiecams.com subdomain issue http://sofiecams.com/

I am doing multi site on bitnami.
ERROR: http://pressplay.sofiecams.com
Warning! Problem updating http://pressplay.sofiecams.com. Your server may not be able to connect to sites running on it. Error message: Couldn't resolve host 'pressplay.sofiecams.com'

1. What is the best way to setup bitnami ?