here's what you do: yo have to hit them in a certain order. first of all find out which ones turn red, green, and which ones stay blue. then, if i remember correctly, use the alternate mode to hit all the red ones first, then all the green ones, then all the blue ones. that'll open doors in front of you and raise the platform. have fun
P.S. I'm pretty sure that's the color order, so try that first, but I know for a fact that blue is last, so the combos are kinda limited so you won't waste too much time.
P.P.S. Do you happen to know the point of the VR Disks?