if you play with the version available between Feb 20th and Feb 26th, then you should update to the latest version :
and if possible take a saved games a few week before the week 38.
Maybe you'll even have to start a new game.
If u didn't play with the version of last Feb, then could you send to the email address you got your license key from your "Tennis.ini" and "System.log" files, and all of the "Profiles" sub-folder (compressed in .rar or .zip) ?
(everything is in your Tennis Elbow 2006 directory, usually under "C:\Program Files\Tennis Elbow 2006\" )
Then I'll have a look at your saved games to see if it's fixable or not.