problem connection messenger 9

[CyperXero]

I just downloaded messenger 9 and after installation, when I try to start the program starts and when the connection is blocked and nothing more. I tried to reinstall but desinstall same. I have read various tutorials manipulation but I still can not resolve my problem. In addition I notice that when I try to access the parameter connexion Advanced prog crashes when I click on it.

[robodude]

I installed messenger 9 last night on two pc carefree installation has 15 min but no connection problem I even handed messenger plus 4.10 messenger 9 for successfully
I have two accounts and connects the two
it must come from elsewhere
your problem must be on your address and your password?

[Informant]

I tried to put the beta 9 and such so it was upset, I then put the desinstall 8.5 walking . I am waiting to see if someone can give me a solution . I count on you thank you .

[Dr. V]

What you use as antivirus? because it seems that there is an incompatibility between the messenger and Antivirus Firewall

[alkaabi03]

I have problem in signing to my msn messenger,
when i sign using this account , it sign for 5 seconds then sign out and says connections to messenger is lost, however when i sign in with different account in the same computer it works fine, and if i sign in using the same account in different computer it works fine.
i reinstalled the messenger, and restarted the pc but the same problem still
i need your help
i'm using XP as operating system
No antivirus there,