Birth by Sleep Gliding?

So, I'm stuck at Mermaid Lagoon in Neverland as Ventus... because gliding doesn't work.
Alright, I know HOW to glide. You do something similar to air glide (pressing ☐ in midair). You do the same concept, except you press and hold the O button.
If I actually got that correct, it isn't working. I can jump, so my O button isn't broken or anything. I can air glide, but I can't glide. I jump from rock to rock, and I press and hold down the O button, but nothing happens. Any suggestions as to how to fix this or get it so glide can work?

Sorry if I didn't post this in the right section, and thanks for any answers. :)
inb4 firstworldproblems.

 

Did you install Glide into your Action Commands? It won't work unless you do that.

 

... *Biggest derp moment ever*
; ; I forgot. That's what I get for losing my PSP charger for a year. Thank you.