Outlook problem

Hello,
I've just changed from windows 2000 to windows xp.

I thought I'd followed all the instructions on the "tools" option.

Basically my email address is the same. I can't seem to access my yahoo mail direct from outlook on my laptop. I can't import the addresses either! But that's neither here nor there at the moment. I'm only able to access my yahoo mail through the web.
When I try and access my email from Outlook it keeps telling me to enter my username and password which I do but it keeps reappearing. It doesn't offer me an alternative check box like for example "forgotten your password"

what exactly should I type in the incoming server for yahoo?

I know what I should be in the outgoing as this is obviously my internet provider check box.

Any advice will be extremely gratefully received!!

Yours frustratedly
Jasmine