Sorry did not see vista.Ok So the new version huh ok hmmm Pauseing............Sorry thinking i had the same problem a long time ago this is what i did Completely delete all file's contaning LW that will be your first thing to do than try a older version of basic lime wire i do have a site to get it from.Here is a link.
Download LimeWire Basic 4.16.6 - filehippo.com
Ok make sure you download any thing above 4.14.0 Most likely the one's below that 4.14.0 will not connect to the internet.They way to download is to use the green Box to the right.
Hope This Helps.