No active URL in upperscreen Messenger

Hello,

I'm using Windows Live Messenger version 2009.

When I paste a URL in my lower screen, this URL is active so I can click on
it to open a webpage. But when I have pushed the ENTER key and the URL is
moved to the upper screen, the URL is no longer underlined and no longer
active.

This only happens when the URL starts with http:// When the URL starts with
www, everything works fine.

In the Security settings I have enabled "Allow links in the messagewindow"
(or something like that. I use the Dutch version)
I use Kaspersky Internet Security but when I disable IM-antivirus it did not
make any difference.

Did anybody know how I can solve this problem?

Thank u very much !