New Post: Logon Trigger

I just recently tried the following snippet:

new TaskService().AddTask("Test", new LogonTrigger(), new ExecAction("AnExecutable.exe", null, null));

And I get: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))

I'm using the latest DLL and I'm also able to create both daily and weekly triggers.

Any ideas on why the LogonTrigger wouldn't be working?