MSN Messenger and Hotmail

On one of my passports the email function of MSN
Messenger will always bring up outlook express. This is
inconvienient because I always have to open up the
hotmail website and then login, whereas before I simply
right-clicked MSN Messenger and goto My Hotmail Inbox.
This has changed from My Hotmail Inbox to My Email Inbox.
Also I cannot send an email to a contact by simply right
clicking on their name and click send email. What could
be the reason this is not working. Nothing on my computer
has changed but for some reason when I came on recently
it has been like this. Thanks Dave