Problem setting PATH environment

[Jonathan Williams]

Hi
Have just installed Octave 3.6.2 on OS-X 10.6.8 using Homebrew package 
manager.  Seem to be having trouble setting the PATH environment at 
startup.  Ran the following to create path to .m files in subdirectories 
under directory cdll:

octave:14> addpath(genpath("/home/dropbox/cdll"))
octave:15> savepath
warning: savepath: current path saved to ~/.octaverc

I then checked that the path existed before exiting, thinking it would 
be established by .octaverc thereafter.
But it didn't work: after exiting and relaunching Octave the desired 
path didn't exist.  Any suggestions where I am going wrong?

Thanks for any help provided
Jonathan