"techies"
i'm not., but i've try to do the same as you but using Windows Live Mail (prety much the same problems i get is what you are getting)., as far as i know, you wont be able to make any direct connection to your Yahoo account., not even with YPOP!., for that you will need to buy something like a Premium email service that in fact sucks balls! i mean., why should any one on earth should buy a premium email account to just check your own mail using the Internet Browser., pure nonsense....
..or at least is what i got, NOTHING!