In addition, Odin is your safety net for when things go wrong. If you cannot make Odin work, you probably should not be flashing anything. Make sure you are using a data USB cable and not just a charge cable- if it works to transfer files, it should work for Odin. One thing Odin may require however, is a fully powered USB port- make sure you are not using a front panel USB, or USB hub like a keyboard to try to do this. You need a direct connection to a port on the back of your motherboard.
Are you able to transfer files using USB? Does it beep at you when you connect it to your PC when trying to use Odin?