What do you mean? Do you mean that the songs cant get into flash?
If so, then that must mean that your song must be an unsupported file, try finding .wav filed songs
Why... just WHY? Song can't be in the library even with audacity? Just tried it again and again but it wont work!
What's the file format you have there (.wav or .mp3 or others)? Do you mean you have problem with importing sounds in Audacity? I'd appreciate it if you can be more specific with the problem.
Or you can convert it instead. There are quite plenty of free online sound converters you can rely on there. If it doesn't work then let us know.
I tend to use Audacity for .wav sounds yet haven't tried to import .mp3 ones.