I'm trying to use empathy messenger and I'm running into a spot of trouble. All but one of my contacts works, except for the person who's running a MSN Live with a @yahoo.com email address. I've tried deleting and re-adding them, but that only adds the yahoo protocol account. An obvious solution is to ask this person to change their account, but they use it for work so that's not an option. Any ideas as to how I can force empathy to use the MSN protocol rather than the yahoo one?