Need help running Final Fantasy 14 on Mac Pro

First of all, the problem that I'm experiencing with the benchmark score of 450 or so and I am not sure why. I was able to install the game no problem; even viewed the movie intro and created a character. I experienced the problem when I was in control of my character. Everything began flickering. Here are my specs:

Mac Pro:
2 6-Core Intel Xeon @ 2.66 GHz
8 GB RAM
2 ATI Radeon HD 5770

I'm also using Parallels Desktop 6 and running Windows 7 64-bit.
I've also updated my drivers/have ATI Catalyst + using Directx 11.

Any suggestions? Like I said, my benchmark score was around 450 and I've searched through various forums but I can't seem to find an answer. Any help would necessitate much gratitude If I need to elaborate more, I will.