Did you have trouble with any of the fixes in that help thread (ie not sure if you did things right or didn't want to try)?

After you deleted the preferences folder, did you have to go thru LW's setup wizard all over again? Did you also look for a prefs folder in the old location of C:\Documents and Settings\your username\.limewire?

Go to the gnutella.net file, hover your mouse over the file & see what the file size is...if it's 0 Kb then replace that file again.

Did you also try the older Java version & make sure to delete all other Javas installed before updat1ng/rolling back versions?

Did the problem start after you updated LW?

What's the model of your D-Link?