On an Urban I'd bought a set of EBC shoes, and couldn't figure out what was wrong when mine didn't grab. Turned out that for some reason they weren't making contact. Drum specs were within limit, cable was ok, but they wouldn't touch no matter how you put them on. Check your cable and drum specs.
Never had a problem like that with another set of EBCs so don't know what it was.
Found a pair of stock shoes and they were fine.
If you got them from Treats, maybe they'll swap them out.