Help for jcms4

hey. . Why when i access my site it have error . . The error about antiflood. . .

please help me use johncms 401 but can not upload files to an avatar that can upload photo albums, what should I fix

Быдлокодер (18.02.2011/17:51)
delete file files/cache/http_antiflood.dat
And do not quickly "jump" on the links.