Try this. Open up Feral Heart and go onto the main screen where the menu is. Select 'Options' then go to the section labeled 'Video'. After that select 'Rendering Subsystem' and Direct3G9.
You may have to restart FH and your computer for the System to take place.
If not then try look here (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=10423.0) and find what you're looking for.