You have to contact the support team of Windows Live Messenger for this. They're the experts in the field of your inquiry that's why you have to get in touch with them. To do this:
1.Go to http://help.live.com/help.aspx?project=a&querytype=topic&query=Default_Help_PROC_MessengerVersion.htm&market=en-us
2. Click on the version of messenger that you're using.
3. On the left panel click any FAQ (Frequently Asked Questions) link.
4. On the lower right corner of the page click “Get more help”
5. Click “Get support”
6. Complete the e-form and then click Submit.
Note: I've moved your post in the Non Hotmail Questions forum because this is the appropriate one for it.