TestStand C# adapter - Constructor not showing input variables

Using TestStand to test web pages using Selenium.  Tests are built using a Page Object model. The constructor call is:   "public LoginPage(IWebDriver driver) : base(driver)"

TestStand: Step Settings for Action.  Module: Assembly :

Root class is PageObjects.LoginPage and the .Net Invocation is LoginPage()  there are no arguments to be passed to the constructor.  I need to pass the IWebDriver to the constructor which passes the IWebDriver to the base constructor to initialize the driver instance in base & inherited classes. 

Why isn't the parameter list for the constructor of the LoginPage object showing the parameter list? Is it something I'm doing/not doing?  Test run in NUnit test.