Which OSX version are you using? Which version of LW?
1. Do a Safe boot & repair permissions, then reboot normally. See
SAFE Boot & Repair Permissions (ignore the File System Check and Repair (fsck) for now)
2. Whilst LW is closed, delete your LW preferences folder, instructions here:
Deleting LW Preferences folder in OSX
If still no good, report back. Stief might have some ideas.