The message about the debugger not finding a particular source file is unrelated to the program not being able to download properly. Those kinds of "cannot find source file ..." messages can usually be ignored, but if you are experiencing other problems with downloading code or debugging, they are likely unrelated.
Please explain in detail the exact problem you are experiencing and at what point you see it. Screenshots will be additionally helpful in understanding the problem. Examples that come with ControlSuite should work out of the box, so if you are having trouble even just running an example you may want to post that in the C2000 forum as the experts there will have more insight into those examples.