COMException Problem

Wondering if anyone could help with my problem. Below is the code, and after the code an explination of where the exception is thrown.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Web;
using WatiN.Core;
using System.Threading;
using System.IO;

namespace WindowsFormsApplication1
{
public partial class Form1 : System.Windows.Forms.Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {


    }

    private void button1_Click(object sender, EventArgs e)
    {
        Thread t = new Thread(createApplications);
        Settings.AutoStartDialogWatcher = false;
        t.SetApartmentState(System.Threading.ApartmentState.STA);
        t.Start();
    }

    private void createApplications()
    {
        createApp("username", "password", "Test App", "This is just a test description", "http:/mysite.com");
    }

    private void createApp(String username, String password, String appName, String description, String appUrl) {
        var currentBrowser = new IE("http://mysite.com/login/php");

        currentBrowser.TextField(Find.ById("username")).TypeText(username);
        currentBrowser.TextField(Find.ById("password")).TypeText(password);
        currentBrowser.Button(Find.ById("submit")).Click();

        currentBrowser.GoTo("http://mysite.com/createmusicapp.php");

        currentBrowser.TextField(Find.ById("application_name")).TypeText(appName);
        currentBrowser.TextField(Find.ById("application_description")).TypeText(description);
        currentBrowser.TextField(Find.ById("application_url")).TypeText(appUrl);

        currentBrowser.RadioButton(Find.ById("client_application_desktop_1")).Click();
        currentBrowser.RadioButton(Find.ById("client_application_is_writable_1")).Click();

        WatiN.Core.Image captchaImage = currentBrowser.Div(Find.ById("recaptcha_image")).Image(Find.ByStyle("display", "block"));

        Form2 captcha = new Form2(captchaImage.Src);
        captcha.ShowDialog();
    }
}

}

The exception is thrown on this line:

currentBrowser.TextField(Find.ById("username")).TypeText(username);

BUT, it's thrown when it gets to this line:

captcha.ShowDialog();

It logs in, and fills in the app details and Form2 loads fine, but once loaded, after around 2-3 seconds the exception happens. I am wondering if it's anything to do with the threads? But I wouldn't know how to solve it if it was.

The complete exception thrown is:

The object invoked has disconnected from its clients. (Exception from HRESULT: 0x80010108 (RPC_E_DISCONNECTED))

Got! Because of your thread, in windows development, microsoft doesn't suggest access UI by thread. If you really need, use mutex to avoid two or more threads accessing the same UI elemnt at the same time.