shining force III...

hey all,

So i just downloaded shining force III( 116MB ) but i just can't get it to work i have tried almost every emulator there is for sega saturn...
i went through dozens of tutorials on how to run it but still myne is just weird... I get the "disc not suitable..." error
is there a known error with the iso on this site or am i doing something wrong?
can someone plz help me, i'm begging ( i have been wanting this game for almost 6 years now i need to play it!! hehe )