have a project titled "Trials" created using Appwizard(exe)

I have created a dialog which has a list box and a static control text next to it.

But, when I add a Dialog class using the Class Wizard (I call the class as "CTrials"), I get the following message:

"Unable to open the files (C:Program Files Microsoft Visual Studio/My Projects/Trials/Trials1.h,C:/Program Files Microsoft Visual Studio/MyProjects/Trials/Trials1.cpp)for class CTrials"

When I click "OK" I get the message:

"The files (Trial1.h,Trials1.cpp)for the new class "CTrials" contain remnants of that class."

Please please help---