Pokemon Black 2 Error

Hello everyone, i am using No$gba with Pokemon Black 2 and it was all going well until i tried to withdraw pokemon from the PC. When i enter the PC box to withdraw a pokemon i get a pop up window saying "The ROM image has crashed" and i don't know why. Can anyone help me?

Use the DuoS DS emulator

Duos and Desmume run slow for me, No$ is the only one that plays at full speed.