Stepmania not starting on Xubuntu 14.04...what now?

Hey guys,

I just finished compiling a fresh copy of Stepmania 5 Beta 4 on Xubuntu 14.04, but now I can't get it to actually start. Double-clicking the executable does absolutely nothing that I can see, and attempting to run "./stepmania" from command line returns:

 ./stepmania: error while loading shared libraries: libavformat.so.55: cannot open shared object file: No such file or directory 

Has anybody experienced something similar to this? This is my first post on this forum by the way, so let me know if there's any other information that would be helpful.

Copy the executable from stepmania/src/ (where it is now) to stepmania/ (one directory above where it is now.
Alternatively, you could make a symlink like this:

SomeGuyOnTheIntern@computer:~/stepmania/$ ln -s src/stepmania stepmania

Then you should be able to run the symlink fine from the command line. (I've never tried running it any way other than from the command line)

Edit: I forgot to mention that you need to do the same for GtkModule.so.