Using more than one software firewall usually results in 'less' security not more because some firewalls clash with each other, which also causes other problems. So for LW, choose only 'one' of your firewalls to keep active, then put LW on the safe list; User Cant Connect - LimeWire

Depending on which Linksys router you have, they did release a series of 'lemon' versions which had faulty firmware, they never fixed them fully with updates. So again, depending on model, you may need to port forward the device. Otherwise UPnP should work fine if it's not one of these poorer models.

When upgrading to Pro, it's usually wise to delete the LW preferences folder; http://www.gnutellaforums.com/genera...der-vista.html

If still problems, try these suggestions combined http://www.gnutellaforums.com/connec...t-connect.html