OSX 10.8.2 won't boot after installing PGP 10.2.1 MP4

Hi,

We're using a brand new Apple Mac Book Pro running 10.8.2 Mountain Lion and tryng to encrypt the entire drive. As per the October press-releases, we're using PGP 10.2.1 MP4 but after restarting, the grey-screen apple logo turns into a circle with a slash thru it and becomes unresponsive. 

Should this work as a simple install?

Thanks in advance,
Jason