I am having the same problems as this fella, i have went through all the steps and have even went as far as contacting mcafee to see if the fire wall issue was on there end. and it wasnt. i guess the next step to to post my system info. here it is...

1. windows version vista
2. mcafee fire wall and windows firewall (window is disabled)
3. 14 gb left outta 100gb memory
4. using cable for connection
5. using d-link router, (never had a problem with it before)
6. im in my condo, under my own connection
7. using 4.18.3 limewire, java is version 6
8. internet provider is shaw cable
9. the test passed
10.not sharing the connection
11.i have used limewire before and have never had these problems
12.i do see the brick wall and have tried to disable my fire wall but still nothing
13.not sure what port forwarding means
14.using mcafee
15.im in canada

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?