FCKeditor.ReplaceAllTextareas() error

First sorry for my bad English.
I’m trying to use the method ReplaceAllTextareas().
I put the following line in the layout/aplication.html.erb
<!body onLoad=“javascript: FCKeditor.ReplaceAllTextareas()”>
when I try to open page with textarea I get this error:

Unknown action
No action responded to editor. Actions: check_spelling, command,
create_folder, get_folders_and_files, sanitize, sanitize_css,
strip_links, strip_tags, upload, and upload_file

Any help please?