Can you try following this procedure:
http://www.smartcomputing.com/techsupport/detail.aspx?guid=&ErrorID=27257XMetaL uses the same Corel spell-checker component that is used in WordPerfect, including the files in My Documents/Corel User Files.
Note that you must exit XMetaL before you delete the relevant files. Actually to be on the safe side, you should exit all applications before you delete these files, because other applications which use the Corel spell-checker component could lock these files.