ok weird!
maybe some file permission settings aren't correct :/
in your ftp go to wp-content/plugins
in there delete the folder laytheme-carousel
then re-install the carousel addon
unfortunately i couldn't find anything related to this via google
please send your ftp server and login details, website address and /wp-admin/ login and a link to this topic to info@laytheme.com and i will try to see why this could happen