recieving emails via live messanger but not live mail.

Over the past few weeks now, i've been having problems with my Hotmail account, even though i successfully sign in to Windows Live Mail i can't seem to access any emails, they don't even register there arrival, it's only through Windows Live Messanger that i'm able to finaly view & answer them. My Defaults on my PC are set rite, i'm not doing anything differant to how i have used my account before when it was working fine, so whats going wrong ???.