I've had Jet Set Radio Future for years, but I finally decided it was time to beat the game. Now that I've done that, I've been trying to unlock everything. Early on in this pursuit I have run into a problem.

It's only possible for me to tag 98% of the Shibuya District. There is an XL tag on top of one of the platforms that the game will not let me spray. I can't lock on and wildly spraying doesn't do anything. I wouldn't care, except for the fact that this makes it impossible to complete the Jet Graffiti challenge.

Here are two pictures to show were exactly on the map I'm taking about. I took them before I tagged everything else hoping that the problem would go away.

I'm going to assume that it's been a long time since anyone has played this game. Regardless, I'm wondering if anyone knows what's going on. Am I screwed?

You need to grind on the wall.

@Skwire: Yeah, that worked. I feel really stupid now. Thanks for helping me out.