Windows mail - Vista some trouble with send received

Under vista I use windows mail when I make a send received all it’s ok but when I send a new mail this mail he doesn’t work and the fonction send received is disable.

If i uninstal AVST all it’s work.

If i disable the scan on the smtp It’s the same doesn’t work.

If you have a good Idea.You can reply

Andy ;D

I have found windows mail to be quite buggy so I use live mail instead much more reliable
http://get.live.com/betas/home

I haven’t found any problem with it… can you be more specific?
How the ‘live’ version that is beta could be more stable than the default windows mail one?