Use task manager to make sure the correct exe for the game is linked into WeMod.
When the game is running, open task manager, right-click the game’s process then choose “open file location”. The highlighted file should be the one you need to add to WeMod.
Otherwise, please see this post here for troubleshooting: Wemod failed loading the cheats into your game
This game has not been updated for a long time, mainly because the Ukranian developer who made this game was disbanded in 2011, therefore there’s no real reason for the trainer to suddenly break.