I'll assume your using windows firewall.
Start < type Windows firewall in search box < Click the one that says
Windows firewall
Heres what to do next
On the left side there should be a link that says "Allow a program through
windows firewall"
If you are prompted for a Administrative user password enter it.
When it opens Click add program.
Pres the "L" key until you find limewire. (if its there)
If its not there
Click browse
goto C:\Program Files\Limewire
click Limewire.exe
click ok.
click ok again.
If its not checked in Program or pot check it then press ok.
Your done