GFORTRAN library problem: libgFORTRAN.so.1 cannot open....

I've received some executable script for test, but executing this script continuously give me following message

./example: error while loading shared libraries: libgfortran.so.1: cannot open shared object file: No such file or directory

Google search told me to do as following

     $ LD_LIBRARY_PATH=/usr/local/lib      $ export LD_LIBRARY_PATH      $ ./example

But it doesn't work for me. I couldn't find where gfortran libraries are installed, too.
My machine us Ubuntu 11.04, so gfortran is already installed. Of course there was no problem for compiling and execution of other .f file using my machine. Only this script fails to run.

Because of other matter, I can't have the compilable file. Only executable is given. He told me it should work for Ubuntu 11.04.

How can solve this matter? Please help me. Thank you

Well, usually you can use 'find' to find missing files, or you can download and install them in their native packsge. And of course add them to LD_LIBRARY_PATH!