I can't get my Pokemon Diamond ROM to save. (No$GBA)?

I had the same problem before but I found the solution.The save type I use is FLASH (either 256 or 512 are the same to me).I found that not all nds rom can be save.Try download the rom from a href="http://www.ndsr.net/." rel="nofollow"http://www.ndsr.net/./a It works for most of no$gba emulator.