Ocean Modifer no working

With a recent built from SVN I noticed, that my ocean using the ocean modifier does not work. checking the same file with 2.62 renders OK.
Can anyone verify this or has an idea what causes this?
As I have been out of the loop of recent development in the last two month it also might be that something changed.

The problem seems to lie somewhere in my build. I downloaded the r50003 build from the build bot and everything was as it should be.

Hi, the ocean modifier is switched off by default, you have to enable it in your build system.

Cheers, mib.