In additional languages login not possible!

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 3.3.6

If i login in default language then the login is possible, but if i try to login on other languages login don't work, i see only default message, JGLOBAL_YOU_MUST_LOGIN_FIRST, how can i fix this problem?

Hi,

This is a Joomla error, we don't have our own login system, we use the Joomla one