Thanks for the response and sorry for missing some items. Here you go.

1. what OS version (eg: Windows 98, XP,OSX, Vista) ? XP SP2
2. What firewalls you have ? Trend Micro PC-cillin
3. How much ram ? 500MB
4. Hard Disk space available ? 16G
5. Connection type (eg: dialup, broadband, cable, etc.) ? DSL
6.Modem what brand name & model numbers ? Westell 6100 (home)
7.Router brand name & model numbers ? D Link DI 624
8. Where are you trying to connect from (house, apartment complex, school, student accommodation, work, etc.) ? House, other locations
9. What version,LimeWire & Java, are you using. Go to L/W's Help/About L/W, THIS show both LW & Java version.? 4.12.11 1.6.0_01
10. Who is your ISP provider (Internet Service Provider) ? Fuse.net, others when traveling
11. Do this test click here: http://www3.limewire.com:6346/ should say 'Your test worked!. What happens ? Your test worked
12. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up. No
13. Is this your 1st try at LW, or is this a new problem with an experienced user.? Am experienced. Problem first occured about a month ago. Downloading newest LW version did not help.
14. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface ? Yes
15. Have you given full permissions for LimeWire to pass through your Firewall ? I don't know. Never had previous problems with PC-cillin.
16. XP users, Please state XP firewall on or off.? Off (PC-cillin firewall active.)
17. In Start & remove Programs, Is this update Installed, "Security Update for Windows XP (KB931261)" ? Don't know, lets assume yes, as I receive updates weekly.
If Windows Updates are not seen, Tick the box at top of page, (show updates)
18. Are you using Manual Port faward in LimeWire OR UPnP ? UPnP. Based on your response to another person, I switched to MP and entered in 45000 there and on the listening port. No difference.
You can check HERE, IN LimeWire Go, Tools/options/advanced/firewall Config

Also remember that I am able to connect to LW 4.9 on a Mac, through the same ISP, router, modem, etc. with no problem. Since this is a recent problem (about a month), may be an update issue.

Thanks for your help.