This shouldn't be here..
This should help you http://www.mpgh.net/forum/186-combat...ll-errors.html
and if you don't understand that, just download the latest .NET Framework, DirectX, and C++ Redistributable package. Kaythx.
msvcr100d.dll(Just in case)
Place those three files in your CA directory, most likely C:\Nexon\Combat Arms, and place it in your Windows folder, C:\Windows.