"delete" doesn't work at all ? filter chain haltedication.rb

hello

i have a couple of apps running fine, excepting deleting. Each time user calls delete, for any kind of model, i have this error (from log file)

rubyonrails website Filter chain haltedication.rb:64>] returned false as [#<
Proc:0x030e5a68@C:/Rails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/verification.rb:64>] returned false

it redirects then to /

the error also occurs on my CentOs setup. i use latest ruby & rails packages

I don’t have a clue, i have googled it but i can’t see where is the problem ???

thanks.