Class Library Delegate Event Passing To Another Executable?

Me again, this time building a Class Library with a  Delegate and Event which I would like to pass it's Status to Form1 in another executable. Here's what I have so far, it doesn't error, just doesnt' show in the Form1 textbox. I'm guessing it's a threading issue.

Note: the 'FtpClientStatusEventHandler' and event works within it's own project.

My ultimate goal is to pass status messages from my .dll class library to any subscribing exe or possibly another .dll

[.dll]
namespace FtpClientManager
{
    public delegate void FtpClientStatusEventHandler(string statusMessage);

    public interface IFtpClient
    {        
        event FtpClientStatusEventHandler StatusMessage;
     }
}  

[.exe]
using FtpClientManager;

 public partial class Form1 : Form
 {
        IFtpClient ftpClient = new FtpClient();

        public Form1()
        {
            InitializeComponent();
         
            ftpClient.StatusMessage += new FtpClientStatusEventHandler(ftpClient_StatusMessage);
        }

 void ftpClient_StatusMessage(string statusMessage)
        {
            if (textBox2.InvokeRequired)
            {
                textBox2.Invoke((MethodInvoker)delegate { textBox2.Text = textBox2.Text + "\n\n" + statusMessage; });
            }
            else
            {
                textBox2.Text = textBox2.Text + "\n\n" + statusMessage;
            }
        }
}