Trouble Controlling PivotChart Image Size

I'm having some difficulty in an aquascript in controlling the size of output chart. No matter what I set the chart properties to for setImageHeight and setImageWidth, the output chart is ALWAYS 800x600. Here's the setup of the chart properties and where I write it to file. The small size of the chart is corrupting the text on the chart. // create pivot chart pivotChart = aqua.chart.newChart(); pivotChart.setDataSource(pivot); pivotChart.properties.setThemeDefault(); pivotChart.properties.setBackgroundColorBottom('#d7dcf5'); pivotChart.properties.setBackgroundColorTop('#ebf0f5'); pivotChart.properties.setCategoryAxisDateFormat(""); pivotChart.properties.setCategoryAxisDateTimeFormat(""); pivotChart.properties.setCategoryAxisTimeFormat(""); pivotChart.properties.setCategoryAxisNumberFormat(""); pivotChart.properties.setCategorySpacing(1.0); pivotChart.properties.setDepth(5.0); pivotChart.properties.setNumericCategoryAxis(false); pivotChart.properties.setFixedCategoryCount(0); pivotChart.properties.setShowFixedCategoryCount(false); pivotChart.properties.setFont('Arial-PLAIN-17'); pivotChart.properties.setFontTitle('Arial-PLAIN-17'); pivotChart.properties.setLegendFontSize(1.0); pivotChart.properties.setSeriesFontSize(1.0); pivotChart.properties.setCategoryFontSize(1.0); pivotChart.properties.setValueFontSize(0.5); pivotChart.properties.setTitleFontSize(1.75); pivotChart.properties.setAxisTitleFontSize(1.25); pivotChart.properties.setDataLabelFontSize(1.0); pivotChart.properties.setGroupSmallValuesThreshold(3.0); pivotChart.properties.setGroupSmallValues(true); pivotChart.properties.setHeight(30.0); pivotChart.properties.setImageWidth(2000); pivotChart.properties.setImageHeight(2000); pivotChart.properties.setShowLegend(false); pivotChart.properties.setShowLegendBorder(true); pivotChart.properties.setLegendHeight(160); pivotChart.properties.setLegendHeightTypeFit(); pivotChart.properties.setLegendPositionTopRight(); pivotChart.properties.setLegendWidth(100); pivotChart.properties.setLegendWidthTypeFit(); pivotChart.properties.setUseLegendMargin(false); pivotChart.properties.setLightingDefault(); pivotChart.properties.setOpacity(1.0); pivotChart.properties.setLineWidth(1.0); pivotChart.properties.setShowMarkers(true); pivotChart.properties.setMapRange(''); pivotChart.properties.setMapRangeColors(''); pivotChart.properties.setMapShowBackground(false); pivotChart.properties.setMapShowDetails(false); pivotChart.properties.setMergeAxis(true); pivotChart.properties.setPanX(0.0); pivotChart.properties.setPanY(0.0); pivotChart.properties.setPieShowLines(true); pivotChart.properties.setPieShowValues(true); pivotChart.properties.setPieExplode(0.0); pivotChart.properties.setPieLabelDistance(3.0); pivotChart.properties.setReverseValueAxis(false); pivotChart.properties.setRotationX(325); pivotChart.properties.setRotationY(0); pivotChart.properties.setRotationZ(0); pivotChart.properties.setSeriesAxisDateFormat(""); pivotChart.properties.setSeriesAxisDateTimeFormat(""); pivotChart.properties.setSeriesAxisTimeFormat(""); pivotChart.properties.setSeriesAxisNumberFormat(""); pivotChart.properties.setSeriesSpacing(1.0); pivotChart.properties.setStackedPercent(false); pivotChart.properties.setTitle(''); pivotChart.properties.setTitlePositionBottomCenter(); pivotChart.properties.setUseTitleMargin(false); pivotChart.properties.setUseAxisTitleMargin(false); pivotChart.properties.setAxisTitleOnEdge(false); pivotChart.properties.setTitleCategory(''); pivotChart.properties.setTitleValue(''); pivotChart.properties.setValueAxisNumberFormat(""); pivotChart.properties.setWidth(30.0); pivotChart.properties.setView2D(false); pivotChart.properties.setFitChartToImage(true); pivotChart.properties.setZoom(1.0); pivotChart.properties.setShowDataLabels(true); pivotChart.properties.setShowValueAxis(true); pivotChart.properties.setShowValueAxisTicks(true); pivotChart.properties.setShowValueAxisLines(true); pivotChart.properties.setShowCategoryAxis(true); pivotChart.properties.setShowCategoryAxisTicks(true); pivotChart.properties.setShowCategoryAxisLines(true); pivotChart.properties.setShowSeriesAxis(true); pivotChart.properties.setShowGrid(true); pivotChart.properties.setFillGrid(true); pivotChart.properties.setGridOpacity(0.5); pivotChart.properties.setGridLineWidth(1.0); pivotChart.properties.setChartTypePie(0);