Outlook dont want to be my default program

Perhaps something in here might help:
How to change Windows Live Mail association with Messenger, for email ?? - Vista Forums

Re: How to change Windows Live Mail association with Messenger, for email ??

To stop WLM from signing on(automatically or prompting) with/for a Live ID when opening:
WLM/Tools/Options/Connection/Stop signing on

For Messenger(from the online Help available after opening Messenger)
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Sign in automatically and set your online status:
Windows Live Messenger can sign you in automatically and set your status when you connect to the Internet. The sign-in
automatically tool is useful on a private computer. However, if you use a public or shared computer, others can access your account
if you select Remember my password.

Set Messenger to sign you in automatically.:
In the Messenger sign-in window, enter your e-mail address and password.
Select the Remember me and the Remember my password check boxes.
Select the Sign me in automatically check box to turn on automatic sign-in.
Your selections take effect the next time you open Messenger.

Tips
To set your status, click the arrow button next to Sign in as, and then select the status you want Messenger to display when you
sign in.
To remove your sign-in information, clear the Remember Me and the Remember my Password check boxes.
Note
If you're using Windows Vista and have your Presentation Settings enabled, you won't be interrupted by notifications when your
status is set to Busy.