fail to sync yahoo mail contacts with iphone
I'm trying to sync my yahoo personal account with my iPhone 4S and also tried on 5, running the newest IOS version on both. First I get a fail message that the it "cannot connect using SSL", then when I hit continue I get a "Contacts account/ CardDAV account verification failed." Is this a persistent problem, and if so, what can be done to work around or correct for it? I'd like to merge all my contacts into one if possible.