I also had the same problem. The export command is supposed to save your PATH in the profile.rc file in your home directory (i think...i'm on a windows machine right now). It didn't seem to be working for me either. But anyways, rather than setting your path every time you start Limewire, i just edited the profile.rc file, looked for where it defined the PATH, and added java to it. Simple, and proper, and it would NEVER forget it after that.