I'm attempting to install BossCart. I'm running RedHat Enterprise 4, Apache/2.0.52, PHP 4.3.9, and gd-2.0.33 (upgraded from gd-2.0.28-4 after the installation of BossCart did not recognize). When I run the install, under checking requirements I get a GD version:Failed and mod_rewrite: not available. I know the gd library is installed and mod_rewrite is enabled on apache. What should I do?