MAC OS X - Messenger 6.0.3 - problem installing "newer version"

Everytime I try to log-in I keep getting this window saying: <br>
"A newer version of MSN Messenger for Mac is available. You must download
the newer version in order to continue using MSN Messenger. Would you like
to do this now?". <br><br>I click yes to downlaod now. <br><br>Then I get
this "Messenger.bin" icon on my desktop. <br><br>I open that but all it
does is kind of duplicate and I now have two [the second one says
"Messenger.bim.cpgz"]. <br><br>So I try to log-in again and I get that
same message. <br><br>So this time I click NO. <br><br>The box disappears,
but pops back up if I try to log-in again. <br><br>I don't know what to do.