combat flight ww 11

Hi guys I am not sure if I am doing the right thing here but here goes.

Is it possible to play cfww11 in a games room my brother in aust I am in uk we both have cfww11 installed I am on winxp home he his on winxp pro this is an old win 98 sim and runs well on both our computers but would love to have a battle against each other on line we have tried to set up a multyplayer mission with no success. perhaps it can,t be done.so any help or comments will be appricated
kind regards kimo