Socket exception

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Windows

I have a desktop application listening for in coming connection request, this works fine. What isn't working fine is the mobile side of things, I am trying to send a string over bluetooth to the listning server but am getting a socket exception:

Code on mobile/client (Windows Mobile 5.0 device):

private void btnPlay_Click(object sender, EventArgs e)
{
    TcpClient tcpClient = new TcpClient(Dns.GetHostName(), 2112); <<ERROR HERE?
    NetworkStream ns = tcpClient.GetStream();
    string objSent = "Play";
    
    int data = Encoding.ASCII.GetByteCount(objSent);
    while (data != -1)
    {
        ns.WriteByte((byte)data);
        data = Encoding.ASCII.GetByteCount(objSent);
    }
    ns.Close();
    tcpClient.Close();
}

Following is the error:

An error message is available for this exception but cannot be displayed because these messages are optional and are not currently installed on this device. Please install "NETCFv35.Messages.EN.wm.cab" for Windows Mobile 5.0 and above or "NETCFv35.Messages.EN.cab" for other platforms. Restart the application to see the message.