Tracking numbers, regardless of shipping method (UPS, USPS, Fedex), may not work for the first several hours after you've received your shipment confirmation email; this is normal as It takes a little while for the tracking information to make it into the shipper's online tracking system.
That means you shouldn't worry if you check your tracking number right away and get a 'not found' error such as the following message: "UPS could not locate the shipment details for your request. Please verify your information and try again later." Your tracking information should be available online later that evening.
If it's been more then 24 hours and you're still not getting tracking information for your tracking number, please contact us.