Try rebooting your PC so your drivers can be properly installed, verify usb debugging is unchecked (settings - applications - development) and connect your phone to a different port.. If it was a drivers issue that should work..
If it doesn't, close odin and kies and check usb debugging. Turn off your phone and restart in Download Mode (volume low + home + power). Connect your phone to your PC and let the drivers install. Once finish, disconnect, reboot your PC and your phone (press power button 10 seconds). Once both turned on, uncheck again usb debugging and connect your phone..