More SKATE. help please...?

Okay, any help on the manny madness photo shoot challenge for skateboard mag, it's the one where you have to skate the two boxes and do two manuals, I can get onto the first box and land in a manual, but then I struggle getting over to the other box, I can not seem to ollie far enough, and if I do manage to get to the other box, I cannot land in a manual, thanks in advance for any advice.