Ok so I'm at the part where you get Walk II, but every time I click to upgrade it says it didn't work. Any reason as to why this is happening? The three cards say, Zoomability, Walk II, and Map. the other two I cant get because not enough imagination, so is there some kind of fix to this? This happened to me before at the previous upgrade screen, but that was fixed after sending a report. Is this going to happen every time? Please help, thanks.