2 fatal errors (authors & members (in admin))

hello.
i just installed the new efiction 3.4 and i'm getting errors when i click on "authors" on the main page and "members" (in admin panel). i've been searching the forum for a solution to the problem, but couldnt find anything. the errors are:

authors:
A fatal MySQL error was encountered.
Query: SELECT author.penname as penname, author.uid as uid, ap.stories FROM ficfanfiction_authors as author LEFT JOIN ficfanfiction_authorprefs AS ap ON author.uid = ap.uid GROUP BY author.uid ORDER BY author.penname LIMIT 0,25
Error: (1054) Unknown column 'ap.stories' in 'field list'

members (in admin panel):
A fatal MySQL error was encountered.
Query: SELECT count(author.uid) FROM ficfanfiction_authors as author LEFT JOIN ficfanfiction_authorprefs as ap ON author.uid = ap.uid WHERE ap.stories > 0
Error: (1054) Unknown column 'ap.stories' in 'where clause'

how can i fix this? please help.