NDS save problem and help with MAME Plus.

Hi.
First of all I'm having problems saving DS Rom states. I tried to save Sonic Rush Adventure using the built-in saving capability, but it when I play the game next time, it's a new game. The Second types of games don't have a internal save state ( Sonic and the Dark Brotherhood and Sonic Rush). My second problem is When I try to play Sonic the Fighters with MAME Plus, I just get these gray bars when I try to run it. Do I need Sega Bios?Thanks,
Vivo

http://gbatemp.net/index.php?showforum=107

thanks