Ah, yes, rkms2013, you'll first need to figure-out how to get adb to talk to your custom recovery before this will all work.
If you have your CWM booted-up, it should be running an adb daemon, so make sure you have it running before trying to use any of your adb commands.
Check to see if you've got the right drivers installed and that CWM is running, then try an adb devices command to see if your PC can see your phone.
In the meantime, if you tell me which Kitkat ROM you installed (i.e., name, version #, where you got it from, etc. (direct link of the .zip file would be great!)), I can try to find it and extract the build.prop file from it for you.
Also, I'm going to move this thread to the Samsung Galaxy Y Duos all-things-root area as mentioned earlier in case there are others that can help.