Ok, the problem is clear... you just have a wrong file.

All lite-C files have the extension .c, and "main.wdl" whatever it is, is not a lite-C file. Thats why it does not accept breakpoints and also won't start.

Files that contain lite-C code all end with .c, such as earthball.c, opengl.c or any other of the examples that come with lite-C.