[ruby-talk:13617] No such file to load -- net/ftp (LoadError)

I am trying to execute a simple script from with a C program, but with
little success. The version of Ruby is 1.6.3, running under Linux and Cygwin
1.1.8 on Windows 2K. I get the same error on both systems.

The Ruby script, get.rb, is:

    require 'net/ftp'

    ftp = Net::FTP.new('savage', 'anonymous', 'jc@savage')
    ftp.gettextfile('/pub/source_ftp.txt', 'gotten_ftp.txt' )
    ftp.close

The ruby script works fine when run in the Ruby interpreter, but fails when
I put into my code. but when I run from the following C code:

    #include <ruby.h>

    int main( int argc, char** argv )
    {
        printf("Initializing the interpreter...\n");
        ruby_init();
        ruby_init_loadpath();
        printf("Setting the runtime options...\n");
        ruby_script( "embedded" );
        rb_load_file( "get.rb" );
        printf("Running the script...\n");
        ruby_run();
        printf("Done.\n");
        return 0;
    }

I get this error message:
    [SAVAGE ~/ruby]$ ./ftpget.exe
    Initializing the interpreter...
    Setting the runtime options...
    Running the script...
    get.rb:1:in `require': No such file to load -- net/ftp (LoadError)
            from get.rb:1

So where am I going wrong???

John