[otrs] GD libraries - Mac OS X install?

Hi, I have OTRS installed and finishing up the setup to do a test with live customer care emails tomorrow. I have verified that the necessary GD libraries are installed by using the checkmodule script. If I click on Stats, it only shows a breakdown of ticket numbers but NO graphs. Has anyone out there run into a similar problem? System is an Apple Xserve running OS X Server 10.2.8. Thanks