Stacked colum chart Problem

[PatrickHerron]

I am currently building a stacked column chart.
I am using ext.net mvc 3.3.
The current issue is that my stacked bars are all beginning from the x axis in each column (all overlapping each other).
here is a copy of my stackedColumn chart code.

Html.X().Panel().Layout(LayoutType.VBox).Hidden(!(bool)SessionHelper.StackedColumnChartVisible).Border(true)
          .Region(Region.Center).ID("StackedColumnPanel")
            .Items(
            Html.X().Panel()
        .Width(800)
        .Height(600)
        .Layout("fit")
        .TopBar(Html.X().Toolbar()
            .Items(
                Html.X().ToolbarFill()
            )
        )
        .Items(
                     Html.X().CartesianChart()
                        .Store(Html.X().Store()
                            .ID("StackedColumnChartStore")
                            .Data(Model)
                            .Model(Html.X().Model().Fields("XAxisField", "ENVACount","VACount","NVACount","OtherCount"))
                            .ServerProxy(Html.X().AjaxProxy().Url(Url.Action("Read")))
                        )
                        .Axes(
                            Html.X().NumericAxis()
                                .Position(Position.Left)
                                .Fields("ENVACount,VACount,NVACount,OtherCount")
                                .AdjustByMajorUnit(true)
                                .Grid(true)
                                .Title("Categories")
                                .Minimum(0)
                                .Renderer(r => r.Handler="return Ext.util.Format.number(label, '0,0');"),

                            Html.X().CategoryAxis()
                                .Position(Position.Bottom)
                                .Fields("XAxisField")
                                .Title((string)SessionHelper.GroupByValue)
                                .Label(Html.X().ChartLabel().RotationDegrees(-45))
                        )
                        .Series(Html.X().BarSeries()
                            .Highlight(true)
                            .XField("XAxisField")
                            .YField("ENVACount")
                            .Stacked(true)
                            .Tooltip(Html.X().ChartTip()
                                .TrackMouse(true)
                                .Renderer(r => r.Handler = "this.setTitle(storeItem.get('XAxisField') + ': ' + storeItem.get('ENVACount'));")
                            )
                            .Label(Html.X().ChartLabel()
                                .Display(SeriesLabelDisplay.InsideEnd)
                                .Field("ENVACount")
                                .Orientation(Orientation.Horizontal)
                                .Color("#333")
                                .TextAlign(TextSpriteAlign.Center)
                                .Renderer(r => r.Handler = "return Ext.util.Format.number(text, '0');")
                            ),
                            Html.X().BarSeries()
                            .Highlight(true)
                            .XField("XAxisField")
                            .YField("VACount")
                            .Stacked(true)
                            .Tooltip(Html.X().ChartTip()
                                .TrackMouse(true)
                                .Renderer(r => r.Handler = "this.setTitle(storeItem.get('XAxisField') + ': ' + storeItem.get('VACount'));")
                            )
                            .Label(Html.X().ChartLabel()
                                .Display(SeriesLabelDisplay.InsideEnd)
                                .Field("VACount")
                                .Orientation(Orientation.Horizontal)
                                .Color("#333")
                                .TextAlign(TextSpriteAlign.Center)
                                .Renderer(r => r.Handler = "return Ext.util.Format.number(text, '0');")
                        ),
                            Html.X().BarSeries()
                            .Highlight(true)
                            .XField("XAxisField")
                            .YField("NVACount")
                            .Stacked(true)
                            .Tooltip(Html.X().ChartTip()
                                .TrackMouse(true)
                                .Renderer(r => r.Handler = "this.setTitle(storeItem.get('XAxisField') + ': ' + storeItem.get('NVACount'));")
                            )
                            .Label(Html.X().ChartLabel()
                                .Display(SeriesLabelDisplay.InsideEnd)
                                .Field("NVACount")
                                .Orientation(Orientation.Horizontal)
                                .Color("#333")
                                .TextAlign(TextSpriteAlign.Center)
                                .Renderer(r => r.Handler = "return Ext.util.Format.number(text, '0');")
                        ),
                            Html.X().BarSeries()
                            .Highlight(true)
                            .XField("XAxisField")
                            .YField("OtherCount")
                            .Stacked(true)
                            .Tooltip(Html.X().ChartTip()
                                .TrackMouse(true)
                                .Renderer(r => r.Handler = "this.setTitle(storeItem.get('XAxisField') + ': ' + storeItem.get('OtherCount'));")
                            )
                            .Label(Html.X().ChartLabel()
                                .Display(SeriesLabelDisplay.InsideEnd)
                                .Field("OtherCount")
                                .Orientation(Orientation.Horizontal)
                                .Color("#333")
                                .TextAlign(TextSpriteAlign.Center)
                                .Renderer(r => r.Handler = "return Ext.util.Format.number(text, '0');")
                            )
            )
            ),

Any help would be much appreciated.