Vista - Windows Live Messenger call a contact

I have a new pc with Windows Vista Home Premium. I installed Windows Live
messenger and was able to use the call a contact function and talk with
friends for a couple days but now all it does is say "connecting with..." and
never actually connects, although text is working fine. Sometimes I hear the
ringing and sometimes I don't. I tried uninstalling and re-installing to no
avail, I even rolled back to the date I bought the pc and started again. I
suspect it has nothing to do with WLM and everything to do with a vista and
or security setting I made without knowing the implications. Any ideas on how
to get voice working again? I'm a noob and really miss this option.

Hi Alan,

You might try this and see if will help. If not, just undo it.

Windows Live Messenger Sign In error

Hope this helps,
Shawn