Multisite Subdomains No Longer Working

A fews months ago I had setup a multisite installation for a client at http://neilhaley.com and added the following subdomains totaleducationnetwork.neilhaley.com and totalradionetwork.neilhaley.com. My client is using 1and1 hosting which doesn’t support wildcard subdomains so I manually added them. I installed WordPress MU Domain Mapping so that the domains http://totalradionetwork.com and http://totaleducationnetwork.com would point to the subdomains. The two domains are registered on whois.com. Everything had been working as perfectly up until a few days ago when the subdomains were no longer loading. The primary site still works just fine but when you go to either of the other two site the browser gives you a either “the site too to long to respond: ERR_CONNECTION_TIMED_OUT” or something along those lines.

I can’t seem to figure out what could have caused this as the settings have not been changed at all since I first got everything to work initially. Any thought?