I have had the same problem. I've tried on numerous occasions to delete it from the appa file/roaming and continue to have the problems connecting. Perhaps for the moment Limewire is not compatible with Vista. Does this sound plausible? I've listed on other threads the answers to the link you've provided however no one seems to have the answers and it also appears that I am not the only one having connection problems with LimewirePro. I did have a pop up on my computer indicating that I am having compability problems with it. Maybe limewire needs to upgrade or do an evaluation of their system in order to correct this problem with the many that are having the same issue. I would truly appreciate any help you can offer or if you can find out what the compability issues are that most everyone is having. Whether they are newly installing it in their new computers like myself or upgrading, everyone seems to be saying the same thing.