Hi podo,
In LW file > disconnect. Wait 5 minutes, then file > connect.
Try uninstalling LW (start > all progs > LimeWire & use the uninstall option). Once it's uninstalled, use your computer's search to look for all files & folders with limewire in the name. Delete what you find. Restart your computer, do the search for limewire files & folders & delete anything that you find. Now reinstall LW.
I'll send you a link to download an older version of LW, just in case an older version might connect...you never know!
Can you try using another p2p app/apps & see if you can connect using a different app? Try FrostWire (much the same as LW)
FrostWire.com » Official Website & Free Download «
BearShare (the version Aaron mentions in this thread)
BearShare has been sabotaged.
or Phex
Get Phex - PhexWiki
The fact remains that your port 6346 test didn't work & that often points to problems with an ISP (regardless of what they say).