lot of apps keep a 'lock file' that, if present, prevent another instance being started (mozilla/netscape..)
if there is a .licq dir under ur home dir, chk for a lock file, and delete it. then try. but anyway, this is just a warning.
the error message is about the plugin. if licq plugins are like mozilla's, why dont u make a link to '/usr/local/lib/licq/licq_plugins.so' in licq plugins folder in ur home dir?
im just guessing, hope it works.