Debug Class

Dear Gurus,

I am debugging a class and its method.

After break point is set in code, must I set break point from menu again when the debug screen has appeared?

I used the pull-down menu and set the breakpoint as well and it prompts me to enter the class and method. But i not sure to choose global class or local class. Its a z-copy of SAP class.

Also, after sm50, and choosing debug program, nothing happens. What should happen? The initial debug screen with code that system brings me into , i could not see my code.

Pls advise.

Thanks,

Suzie