Problem: execution doesn;t come to the breakpoint

Hi,

Please someone help me with this as I'm  a newbie to this debugger.
When I debug the project the execution doesn't come to my breakpoint 
which I'm sure the execution should come.

The project has a lot of files in different directories. I checked the 
*.o file is also created to the file. I added the breakpoint after 
opening the file using "open source" command. and when I press the edit 
button it opens a empty vi window in the wrong location which is the 
location that I run the debugger.

1) can the ddd debugger debug project with sources in different 
directories?
2) What is the correct method if the method I mentioned above is wrong?