I am able to connect my phone when it's booted can copy, adb, everything, but the story changes when I put the phone in Download Mode, no sound (default windows device connect sound) is played on my PC and Odin doesn't detect my phone but as soon as I connect my USB cable (while in Download mode) and remove my battery Odin shows "Added!!!" as soon as I put the battery in it shows "Removed!!!" and the phone disconnects!
I got the battery idea from this video: http://www.youtube.com/watch?v=YO7TVY2UXEY
Video exactly depicts the scenario I am going through but when the guy re-inserts his battery his phone isn't disconnected while mine is.
Yes, I have uninstalled and reinstalled Kies, downloaded drivers separately and installed them everything is perfect from that view.