Outlook

So yea, simple problem. i have office 2007, and decided to try outlook, but when i enter my e-mail info, and put in my password, it loads for about a second, then pops up telling me to log in again (all while trying to create an account). After a little reaearch on this topic (I’m not completely helpless) i saw somethin about the yahoo pop server (because i use a yahoo free account). Basically, what I’m askin is if yahoo can be used on outlook with a free account, because i KNOW that paid accounts get it, just not sure if free ones do. Sorry for the wordy description, but thanks in advance.