Windows Form App crashes in Server 2008 obtaining Firewall Manager

Question

I wrote a small C# application to do firewall tasks like block IPs, enable/disable the firewall, etc. It works perfectly on Windows 7 x64 but as soon as I try it on Windows Server 2008 x64 it crashes. This is what my code looks like where its crashing...

public partial class frmMain : Form
{
  private INetFwMgr FWManager;

  public frmMain()
  {
    InitializeComponent();

    Type NetFwMgrType = Type.GetTypeFromProgID("HNetCfg.FwMgr", false);
    FWManager = (INetFwMgr)Activator.CreateInstance(NetFwMgrType);

    if (getFirewallStatus() == true)
        UpdateFirewallStatus(true);
    else
        UpdateFirewallStatus(false);

    ListOpenPorts();
  }
}

The error is something along these lines...

Problem Event Name: CLR20r3
Problem Signature 01: brutalnt.exe
Problem Signature 02: 1.0.0.0
Problem Signature 03: 4ed589c8
Problem Signature 04: mscorlib

When I removed the lines to obtain the Firewall Manager, it started up fine. So do I need to obtain it differently in Server 2008?

Answer 1

This was Answered in the comments, but the issue was with the machine's Active Directory installation and a broken Firewall.