Go to Settings/General/battery, or run
Ampere, so you can see the charging. (Ampere is slow, so move, wait a couple of seconds, move, etc.)
Move the phone around on the stand until you see the charge go up (or "charging" appears in Settings). A Qi phone/charger pair have to be aligned in order to charge. If the phone's coil isn't right over the charger's coil - no charging. (Which is why I prefer a stand that has an LED of some sort indicating when the phone is "charging". It's actually indicating that the phone's coil is drawing current from the charging stand and unless something's broken, that means that the phone is charging.)