Right now is working 
i just restore my backup battery file, and well i am playing right now
I don’t know why is wrong is my connection (very probable, because i live on Venezuela and the speed is extreme slowly ) or the core loading achievements.
Someone had some tips for improve connection to the achievements server ?
The rest the mayor part of time, mGBA, Genesis Plus GX, fails the connection with Achievements. and Cheevos says the game don’t have achievements. when i know yes have it.