Does anyone know why this isn't working?

<p>Yea, I'm having problems with MSN's web messaneger - <a href="http://webmessenger.msn.com/default.aspx?R=1%5B/url%5D"&gt;http://webmessenger.msn.com/default.aspx?R=1&lt;/a&gt;&lt;/p>

<p>Whenever I try to log in, it loads, but then says sign in again. And I don't know how to stop this.</p>