Datagrid-forloop behavior

[picasso101]

Hello experts
I have this behavior that I cannot figure it out. The following code is triggered by a button

try
{

Type typeFWPolicy2 = Type.GetTypeFromProgID("HNetCfg.FwPolicy2");
INetFwPolicy2 fwPolicy2 = 				  (INetFwPolicy2)Activator.CreateInstance(typeFWPolicy2);

foreach (INetFwRule rule in fwPolicy2.Rules)
	{
	lvItems.RuleName = rule.Name; ;
	lvItems.RemoteAddress = rule.RemoteAddresses;
	lvItems.Protocol = rule.Protocol.ToString();
	lvItems.LocalPort = rule.LocalPorts;
	dataGrid1.Items.Add(lvItems);
	//MessageBox.Show("close me");
}


}
catch (Exception ex)
{

MessageBox.Show("something went wrong");

}

When I run it, the datagrid is populated with the same record (first) entry that is repeated several times.
then I added a Messagebox to troubleshoot, then Datagrid is populated correctly but I need to acknowledge each Messagebox !!!!. It is like it just needs that extra mouse click.
any help is greatly appreciated