ANNOYING PROBLEM

Alright, so for some reason, RMVX is refusing to set a blank 'same as character' event to be impassable, as I have the A-1 water tile set to an X, and the B tile it's on is set to a O. Since I'm parallaxing, I want several parts of a map not to be walked on, hence the impassable event, however the tile that the event covers can still be walked on. Now I have everything set up right, so I don't really see why this event can still be walked on.

EDIT: Nevermind, I figured out what I was doing wrong..lol, though I'm not sure why, since both tiles were set to impassable, but I used a blank tile instead of a water tile, then used the B tile as the event, and it worked. A bit strange, though I suppose I'm just more used to VX Ace. :p