Datagrid having checkbox column getting resized at the time of reset

Question

Hi
In my application, I have a data grid in which one column is
having check boxes as itemRenderer.
and there are two buttons in application one is "Clear all"
and another is "Select all".
when I reset the datagrid according to these buttons
operation, it gets resized and scroll bar appears.
It should not get resized.
my data grid declaration is
<mx:DataGrid id="dataGrid" name="dataGrid"
dataProvider="{data.myData}"
selectable="false"
rowCount="{data.myData.length}"
draggableColumns="false" width="{chart.width}"
visible="{data.myData.length>0}"
headerRelease="{dataTableEvents(event)}"
creationComplete="{afterCreationComplete(event)}">
<mx:columns>
<mx:DataGridColumn id="numField" headerText=""
dataField="numPosition" width="40" paddingLeft="10"
paddingRight="10" sortable="false" />
<mx:DataGridColumn id="checkBoxes" headerText=""
dataField="checked" width="32" paddingLeft="10" paddingRight="10"
sortable="false" >
<mx:itemRenderer>
<mx:Component>
<mx:CheckBox click="{data.checked=!data.getChecked();}"
selected="{data.checked}"/>
</mx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
</mx:columns>
</mx:DataGrid>
and reset grid code is
public function resetGrid():void{
for(var i:int =0; i<data.myData.length;i++){
data.myData
.checked = false;
can anyone please help me?
It is very urgent..
Please reply as early as possible.
Thanks in advance
sm15

Answer 1

So the engineer came and, of course, everything was working ok. He did fit some kind of RF filter on my main socket, and 'changed the pair' on one of the outside cables. Since then, I've only had a noisy line once, and seem to have been connected for 3 days solid, which is a record!
I've switched back to my BT Home hub 3, which guavas me more stats. The line has previously given me up to 6mb/s, now only getting 1.6.
Do you think, now the line seems more stable, with the stats below I should be able to maintain a higher speed now?
Thanks
Line state: Connected
Connection time: 3 days, 02:19:39
Downstream: 1.601 Mbps
Upstream: 444.9 Kbps
ADSL Settings
VPI/VCI: 0/38
Type: PPPoA
Modulation: G.992.3 Annex A
Latency type: Interleaved
Noise margin (Down/Up): 17.7 dB / 22.6 dB
Line attenuation (Down/Up): 44.8 dB / 27.0 dB
Output power (Down/Up): 18.6 dBm / 12.6 dBm
FEC Events (Down/Up): 3144673 / 0
CRC Events (Down/Up): 14434 / 38
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
HEC Events (Down/Up): 111873 / 10
Error Seconds (Local/Remote): 1011 / 4