lego-lord of the rings-level 15-battle of pelennor fields

hallo, i am having great difficulties to complete this level with fighting the last olifant. i have been trying for 4 days to get up on the last one. however, my finger timing seems to be totally off. i cannot get legolas up there to finish him off. she always gets killed before i get a chance to swing up there. is there some way, one can get a "save" from someone in order to complete this part? help would greatly be appreciated. this is for the PC. am using windows7 and had two crashes of the game so far. lilimarlen