just a theory but i do not know if this will work, but try just using gmail.com in the pop3 host, just leave the pop. out as not always required on some scripts as they can call this its self.
any way its worth a try
or just try this in you pop3 host
xakbox.com
as thats the ending to your email address, this is most likely to fix the problem but I dont know cos i dont use gmail my self lol