What I use is fraps and I know its hard to use but I have a solution: Open combat arms then really quickly open fraps and its ready to record. If it does not work the first time try again because it does have some problems.
You got further than me with ZD soft game recorder: I would load the recorder and then Rainbow Six and Rainbow Six graphics would just not render at all, so I had a blank screen to play, brilliant. Pfft, use a cracked version of Fraps.
hey dude this happened to me today all u have to do is try and change somthin in it(like a hotkey) then turn on ca it should have the fps frame on the top left if this doesn't work tell me or pm me and i'll help u