zelda -minish cap problem

i am playing zelda on my mobile using gpsp symbian
the problem i am facing is dat i cant roll in the game. the rom works fine on my pc but im facing dat problem on my mobile...
is this the emulator's problem ?? can someone tell me how to fix it

You lack skills, son.

not possible, im damn good @ gaming

have you tried to assign another button for rolling

obviously .... the R button meant for picking up stuff is also meant for rolling... i have already set that..
the thing i hav seen is dat if u play on pc while walking u get an option to press R to roll but on mobile u dont....