The purpose of the post is for people that buy the DLC for Arma 2 Combined Operations off of sprocket and cannot connect to a server after they get their mods running. Czech DLC from sprocket REQUIRES you to have edited your registry so you can run addons/mods OTHERWISE the Czech DLC from sprocket will NOT WORK. This also related to other DLC like PMC/BAF after bought from Sprocket.

PMC Signature Problems when joining servers

+Problem...

PMC signature files are not recognized by server, automatic kick from server

+Situation...

Game bought off Gog.com all other DLC was bought directly from Sprocket

+Steps of installation of content...

Installed Gog,com version of game, already patched to 1.62 after finished installation
Installed DLC from sprocket, BAF, PMC and ACR
Changed registry keys (removed the backslash in registry key main identifyer so I can run addons)
Made a new shortcut with the information as follows <1> Run as admin <2> Target Line reads "E:\Games\BI\ARMA2_CO\arma2OA.exe -nosplash -mod=EXPANSION;ca;ACR;BAF;PMC"
Went into multiplayer and selected a server and clicked the UI Element "Join"
Screen changed to black and text came up saying "Connecting" (Normal)
UI Element popped up saying that my Pmc signature files were wrong, unsigned.
Kicked from server.

+System information

Win 7 64 bit
Zambezi quad core 3.6 AMD Processor
Crossfire Radeon ATI HD 6970 (2)
16 GB of system RAM

+SOLUTION

Target line in shortcut MUST be typed as follows "<Drive Letter>::\<your arma 2 Combined Ops Install Directory>\arma2OA.exe -nosplash -mod=EXPANSION;ca;ACR"