Thanks Pete, I am back at my PC now, and can confirm that is the correct destination.
Just for future reference, experience has shown that all TT Mod problems like this are due to two possible causes:
1) The player has pasted the TT mod into the wrong folder, usually the main build.
2) The download has been corrupted. Unfortunately, with a file of this size that seems to happen occasionally. So if the player is certain he has the mod in his My Documents/My Games/FieldOfGlory2/MULTIPLAYER folder and is still experiencing problems, he should delete it and download the mod again.