Problem using activadmin and jruby 1.6.6 and rails 3.2


Im trying use activeadmin and jruby (last version) with ruby 1.9.2 (from

But i get an error after submit any form to update/create data.

The image of error is here:

Can anyone help me?

I have a fresh version of jruby with rails 3.2 and activeadmin.

It appear be something related with flash_messages, because everything
is normal and the objects are created in database, but when redirect to
index page after create/update i get this error.