How can I retain Gridview cell color which is bounded with datatable.

Hi, I am handling this in this way...

void lFnGridConnStatusColorSetForRows()
{

try
{

foreach (GridViewRow lObjRow in grdDBDetails.Rows)
{
Label lObjLblData = null;

lObjLblData = (Label)lObjRow.FindControl("lblConnStatus");

if (lObjLblData != null)
{
if (lObjLblData.Text.Trim() == CONST_CONNECTED)
{
lFnSetGridCellConnectStatus(ENUM_DB_CONN_STATUS.CONNECTED, 4, lObjRow.RowIndex);
continue;
}

if (lObjLblData.Text.Trim() == CONST_CONNECTION_FAILED)
{
lFnSetGridCellConnectStatus(ENUM_DB_CONN_STATUS.CONNECTION_FAILED, 4, lObjRow.RowIndex);
continue;
}

}
}


}
catch (Exception)
{

throw;
}

}

This is working fine when I am at current row, But when I am calling this at load during post back...it is throwing error as

nvalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.