大家帮忙分析一下这段代码，设置PlotType出错!

1390.hp

 With acadDoc.ModelSpace.Layout      

       '设置打印机和纸张尺寸
        .ConfigName = PrintDriver
        .CanonicalMediaName = PaperSize
       
        '打印范围
        .SetWindowToPlot pLowLeft, pUpRight
        .PlotType = acWindow     '这里出错,前面都运行正常

        '打印样式和单位
        .PlotWithPlotStyles = True
        .StyleSheet = "acad.ctb"
        .PaperUnits = acMillimeters
       
       
        '按图纸空间缩放并居中打印
        .StandardScale = acScaleToFit
        .CenterPlot = True

end with

请高手帮忙啊，感谢！