Does the league show up when you open 11 and go to load saved game?
If not have you checked to see if the file isn't double foldered up? meaning that when you zipped it and then unzipped it the unzip doesnt have name.lg and inside that folder isnt also name.lg vs the league files.
Are you both on same version? 11.2.18? I believe that's the last version of 11.
I am not an internet guru so everything listed in the link below is foreign to me.
http://www.ootpdevelopments.com/documentation/ootp11/index.php?page=setting_up_an_online_league