Pokemon Soulsilver (U) No$GBA Saving Issues

I've been googling around, and I have found out that I am not alone in this issue. Apparently, when playing the game on No$GBA 2.6a (haven't tested other versions or other emulators), the game will no longer be able to save shortly after beating Whitney, the third gym leader. You can't really progress far beyond Goldenrod, because when you attempt to save, the rom crashes, and you receive that stupid fatal error =(.
I have no idea what causes the crash, but essentially the game is unplayable past the third gym leader due to not being able to save at all. No$GBA doesn't have save states or anything like that either, but I would really like to play it.
I did manage to convert my No$GBA save file to one for Desmume, except desmume runs at like 80%, and the graphics glitch a bit, whereas No$GBA runs pretty much perfectly.

Any idea why the save causes a fatal error and rom crash after the third gym leader?

 

You are confusing a few different issues. The Anti-Piracy freezing gets much worse once you pass the Third Gym, to the point where it will freeze on pretty much every action, making it impossible to play.

Please read one of the other topics on how to play this game on No$GBA or how to use the Japanese version patched with the US Versions language files.
http://forum.romulation.net/index.php?topic=37072.0
http://forum.romulation.net/index.php?topic=36368.0