EventListener Addin fails to load

Hi,

I'm creating a NUnit addin as an EventListener so I can hook into the
events being fired.

My install looks like this :

    [NUnitAddin(Description = "Test Tracer")]
    public class TestTracer : IAddin, EventListener
    {
        public bool Install(IExtensionHost host)
        {
            if (host == null)
                throw new ArgumentNullException("host");

            IExtensionPoint listeners =
host.GetExtensionPoint("EventListeners");
            if (listeners == null)
                return false;

            listeners.Install(this);
            return true;
        }
.....

However, in the Addin dialog, its saying there was an error loading it
but I can't find a way to find out information about why it errored.

Any help on this would be great!

Thanks

Ben

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