I just picked up an e-gate card on my last trip through Dubai. I went to the office in the F/J departures area in T3. I had no trouble obtaining the card (this is the regular blue UAE-gate card, not affiliated with EK), but the immigration officer made it sound like my card was not "activated" because I had already departed the country (gone through passport control). I'm not a resident of Dubai, but I hold passport from a visa-waiver country.

Will I need to get my card activated before I can use it? If so, where can that be done?