queerstalline-void

I am trying to transfer my pokemon from my black rom to a new black 2 game, but I can't get it to work. I opened both files in pokehex, dumped and imported my pokemon from black to black 2, but when I try to open the black 2 file with the pokemon from black the emulator is giving me two error messages: 1. The ROM header is invalid. The device size has been increased to allow for the provided file size. 2. sorry... right now , you can't use the default (stream rom from disk) with homebrew due to a bug with DLDI-autopatching and then Desume stops responding and closes. Does anyone know what I'm doing wrong and how to fix this?