My Samsung Galaxy Y GT-S5360 is not starting
If Odin is not detecting your device,  it probably means that your device drivers are not installed. Try installing your device drivers first, and then connect with Odin and flash it. 

Your problem will be solved. 

The other way around is to flash through CWM recovery, if you have it installed on your device. You should have a working ROM zip file.  Place it in SD card and go to CWM recovery and flash it.