I am new at this but i see your steps are in the wrong order....i have done Odin 4x doing it this wayThis is the method that works for me, always. Like, always always. Never failed.
If you have problems getting into Download Mode try this method:
1. Take out your sim card, sd card, battery and open Odin3.
2. Put the battery in.
3. Plug in USB. (the phone will power on to that screen)
4. Hold down both Volume keys, and then push power. Hold it and dont let go.
5. Wait for it to go black.
6. When it goes black the 2nd time release power and keep holding the Vol Down and Vol Up.
1. Take out your sim card, sd card, battery and open Odin3.
2. Put the battery in.
3. Hold down both Volume keys (JUST VOLUME KEYS)
3. Plug in USB (still holding Volume keys)
4. Keep holding JUST VOLUME KEYS