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);;'#d7dcf5');'#ebf0f5');"");"");"");"");;;;;;'Arial-PLAIN-17');'Arial-PLAIN-17');;;;;;;;;;;;;;;;;;;;;;;;;'');'');;;;;;;;;;;;;;"");"");"");"");;;'');;;;;'');'');"");;;;;;;;;;;;;;;;;;