Sign in on MSN Messenger 6.1

I am running Windows XP Home, Office XP (Using Outlook for email) and MSN
Messenger 6.1.

I thought I saw an article at one time that said having the same passport on
Windows Messenger and MSN Messenger causes problems with sign in--now I
cannot remember where I saw this.

Could someone tell me for sure if this is true? I am using the same
passport sign in as I did before I upgraded to MSN Messenger 6.1. If this
is a problem, do I just go to the users screen and set up a new passport and
then sign in with it?

I have been having some trouble with my internet connection disconnecting
intermittently and I am now wondering if the passport issue could be the
problem, but I would like verification on this before I go changing
anything.