Remote Desktop Log Files

Is there a file that XP writes for success or failure
remote desktop connections. I was working for a client of
mine and forgot to take home a print out of the router
page with the IP and related information. I am now
banging my head because I logged into my XP Pro system
from their offices and thought it would store the
connection IP and remote machine name info, etc. IS
there a logfile somewhere ? I searched everywhere and to
no luck =( Not even my microsoft router has any info in
it... .damnit!!!

Any suggestions ?

Shawn