I'm not sure what's happened, but if you're using a version of LW newer than 4.9.34 then you must have a LimeWire folder somewhere. You would've put the gnutella.net file inside the LimeWire folder, so it must be there!
What version of LW are you using?

Try starting again from scratch...restart your computer & then go through the steps in this link: http://www.gnutellaforums.com/connec...tml#post296950