Route 4 - Can't surf where I should be able to

[ShawnMcCod 0]

Hi,

I can't move up from the tiles shown in the images to reach the rock climb wall or waterfall, even though I should be able to (there's nothing in the way). When I press 'Up', I don't move, and there is no 'bump' sound.

 

 

 

The strange thing is I have been able to get up there once before, but when I came back I was unable to again. Here's the savefile: https://www.dropbox.com/s/aqpqu31b8wflfct/Game.rxdata?dl=0

 

Thanks in advance!