ColumnModel Set Header error with mono 3.3.0 - mono

Question

This is my asp.net GridPanel code with columnmodel id ColumnModel3
<South Split="true" Collapsible="true" CollapseMode="Mini">
<ext:Panel runat="server" ID="pnlMsgLst" Frame="true" Height="145" Title="消息列表" AutoScroll="true"
Collapsed="true">
<Content>
<ext:GridPanel ID="vehGridPnl" runat="server" StoreID="msgStore" StripeRows="true"
Frame="true" AutoHeight="true" AutoExpandColumn="Id" AutoScroll="true" EnableHdMenu="false">
<ColumnModel ID="ColumnModel3" runat="server">
<Columns>
<ext:Column ColumnID="Id" Header="ID" Width="80" DataIndex="Id" Hidden="false" />
<ext:Column Header="消息内容" Width="180" DataIndex="Content">
<Renderer Fn="change" />
</ext:Column>
<ext:Column Header="车牌号码" Width="90" DataIndex="CarPlateNo">
<Renderer Fn="change" />
</ext:Column>
<ext:Column Header="设备ID" Width="90" DataIndex="DevID">
<Renderer Fn="change" />
</ext:Column>
<ext:Column Header="经度" Width="80" DataIndex="Longitude">
<Renderer Fn="change" />
</ext:Column>
<ext:Column Header="纬度" Width="80" DataIndex="Latitude">
<Renderer Fn="change" />
</ext:Column>
<ext:Column Header="速度" Width="70" DataIndex="Speed">
<Renderer Fn="change" />
</ext:Column>
<ext:Column Header="方向" Width="70" DataIndex="Angle">
<Renderer Fn="change" />
</ext:Column>
<ext:Column Header="定位" Width="80" DataIndex="Location">
<Renderer Fn="change" />
</ext:Column>
<ext:Column Header="时间" Width="150" DataIndex="Date">
<Renderer Fn="change" />
</ext:Column>
<ext:Column Header="车辆状态" Width="300" DataIndex="Status">
<Renderer Fn="change" />
</ext:Column>
</Columns>
</ColumnModel>
<SelectionModel>
<ext:RowSelectionModel ID="RowSelectionModel3" SingleSelect="true" runat="server">
</ext:RowSelectionModel>
</SelectionModel>
</ext:GridPanel>
</Content>
</ext:Panel>
</South>
this is a Javascript, when page loaded, will automatically run this function
function ChangeTitle() {
vehListPanel.setTitle(VehList_Title + " :" + nVehCount.toString());
btnVehDetails.setText(vVehDetails);
pnlMsgLst.setTitle(pMsgList);
ColumnModel3.setColumnHeader(1, pContent);
ColumnModel3.setColumnHeader(2, vVehNum);
ColumnModel3.setColumnHeader(3, vDevID);
ColumnModel3.setColumnHeader(4, pLongitude);
ColumnModel3.setColumnHeader(5, pLatitude);
ColumnModel3.setColumnHeader(6, pSpeed);
ColumnModel3.setColumnHeader(7, pAngle);
ColumnModel3.setColumnHeader(8, pLocate);
ColumnModel3.setColumnHeader(9, pTime);
ColumnModel3.setColumnHeader(10, pAlarmStatus);
}
This Function will change the columnmodel3 header.
Unfortunately, this only work on IIS, when i m trying on my real server, it will return an Error
ReferenceError: ColumnModel3 is not defined
ColumnModel3.setColumnHeader(1, pContent);
is this a bug? or what? any other way to change the column header ?
Server are using mono3.3.0,xsp4 and ext.net version is 1.3.0
P/S : other components like button,label are working proper with SetText and SetTitle. just ColumnModel having the problem.

Answer 1

Since, the way can't work, i m trying on firebug to change the header, and finally i get the way to change the header from firebug with javascript like this
vehColModel = parent.frames["StatisticFrm0_IFrame"].vehGrid.colModel
vehColModel.setColumnHeader(3, vVehNum);
vehColModel.setColumnHeader(4, vDevID);