Dead Grass ?

[bigdog]

I have a dead grass area next to my septic tank.
Patch measure about 3'x6'. The grass length is still about 2" long and is blonde/brown in color. I re-seeded this area back in June, and it was starting to come up fine.

What could have happened, and will the grass come back to life in the Spring ?
If not, I will reseed again now.

Your thoughts will be much appreciated !