I dont have a problem about the gameplay but one thing bothers me. I cant save (Menu,Save,Wait after SaveFinish). What should I do to the NDS Cartrige Backup Media? Is it Flash 512kbytes or other?

NOTE:I dont mind the speed of PKMN PEARL(JAP)...Strangely its fast in my laptop but SLOW to my PC.
LAPTOP PC
Inside a Building (90-100%) (60-70%)
Outside/Map (50-80,100 but takes 5 min...) (40-50%)
Battle(90-100%) (80-85%)