I couldn't beat him at 32, either. I grouped up with someone who had failed 14 times! We had to do it twice, once for each of us, but beat him.
Then I got the bug and couldn't talk to the council. I reset the mission and had to level up to 34 before I could bet him solo. Try it again when you level up, and use an endurance stim and a medpack.
And may the Force be with you.