It seems you have various running forum threads surrounding viewing source code.
The issue may becoming a bit obfuscated Perhaps some clarification and simplification is needed to move forward. Based on the threads, I believe you are able to drill to source code for the Tachyon sample after analysis correct? Perhaps you can provide additional information about the differences between your applications, compilation method, environment, type of application, etc. that might be different from the Tachyon example.
Another test, are you able to create your own simple sample application (like hello world) where you also cannot drill to the source from within an Amplifier analysis? This may provide some scope to the problem and perhaps uncover a cause.
Is there a way to determine what is different between the Tachyon example that works as expected and a simple application you have that does not allow you to drill into the applications source file. Are you attempting to drill into source that is not contained in the main source file but a library or other resource.
In regards to the warning: Symbol file is not found. The KB article VTune Amplifier XE collection warning: Symbol file is not found may provide some insight as to what is occurring.