32.768 kHz Crystal Troubleshooting
What exactly is going wrong? What are you expecting it to do and what is it really doing?
I assume that the RTC IC won't clock and stay at time 0:00, but you can talk to it through its serial interface.

I've taken a look at the datasheet and in the control register, there's an external oscillator enable bit, which is set to low by default (disable ext. oscillator). Is it possible that you didn't set that bit? 

Either way, I don't think that it's the crystal that's causing the problem. I think that (most likely), it's the RTC being set up incorrectly.

EDIT: also, according to the datasheet, the recommended load cap value is 6-9pF