I am facing a problem with my slantLabels as well. I am using FusionCharts with PHP Class.
$FC = new FusionCharts("MSColumn3D","1200","520");
$strParam="caption=Average Resolution Times;subcaption=Showing Stats Between $startdate and $enddate;xAxisName=Products;YAxisName=Time(Hours);numberPrefix=;sNumberSuffix=;slantLabels=1;";
$FC->setChartParams($strParam);
However, it simply ignores slantLabels=1. If I use rotateNames=1, it rotates by 90 Degrees. Please Help.