Best Answer Plokite_Wolf, 22 May 2015 - 12:28 PM
Make sure you have the proper version of the game (1.02) and the maps in question (issues will arise with older versions of the 1.02+ maps).
Make sure you place the replays into your Documents folder under Command & Conquer 3 Kane's Wrath\Replays. You can also double-click on a replay file to run it.
Go to the full post