you can't use an older xcode project in 0.04, you just need to copy the source / etc into a 0.04 project.
"libs/openFrameworks/sound/ofFmodUtils.cpp" was removed, thus xcode is complaining. this is why.
we restructure OF from release to release (see the changelog) so older proejcts don't work in new versions of OF (and vice versa)...
hope that helps explain the error, just try making a 0.04 project and bringing the source code ("src") in including the fft.cpp, etc.