killzor55

Anybody help me please.. I copied those 4 pbo files to Addons folder. Now I go to game , I choose a mission Infected.Chernorussia , or something like that. It loads for 4 seconds and then tells me ''You canno't play/edit this Mission , it is dependent on download able Content that has been deleted ; CHN_Undead , CA_AH64D. Please help me someone , tell me what is the solution. If I did something wrong , tell me the EXACT way how I must do and where to copy or extract and so. Thanks!