Again and again... ONLY STOCK (DSL 2.1) PARTS.
If your DSL game is corrupted by cheat parts (yes, corrupted), i suggest deleting the Components folder and the Components.cfz (and only them) in your DSL RA2 folder, then replacing them with the original DSL 2.0 versions.
It will delete all the cheat parts.
This may mess up your game so make a backup copy of your all your DSL RA2 folder first.
And don't ask how to do that... it's easy and you don't need help to do that.