IIS Add Application under MVC

Hi,

I have an MVC app hosted in my local IIS that looks like this http://localhost:81/Home/Login

But i also have a Web Form that i call "Merchants", i need to place this web form just under the MVC  to make the URL look like this http://localhost:81/Merchants

My problem is IIS is trying to look into the MVC controller for the "Merchants" which does not exist, i want hopefully if possible that if the URL points to http://localhost:81/Merchants it will go to the Web Form, otherwise it will go the the usual Controller.

I hope someone can help me,

Thanks