Need help resident evil 5 level 6.3

Hi, I am on the volcano level, I cannot seem to push the rock into the lava, I think I am following the onscreen button prompts ok, but always fail, is there a sure way do the button prompts, it is driving me mad, as I am so close to finishing the game. Any ideas. Thanks.:(

Do you know which prompt you miss? I didn't have a problem with the rock although the analog prompts could be tricky I guess (I think I remember there being analog prompts?). Just try going for clear button presses instead of all out speed as you might be missing the button or something.