Did you confirm that your tablet was actually on the Stratux network? I've been surprised before when I landed at an FBO that had an "Xfinity-wifi" hotspot and my tablet auto-connected to it instead of the Stratux the next time I powered up.
You can do some basic troubleshooting within the iFly app by choosing Menu > About > Connected Devices. That page will give you confirmation that iFly is connected to your Stratux or not.
if it is connected, I think an "advanced" button pops up that gives you some lower-level details about the data it's receiving. Some of those numbers will be incrementing as new data comes in, so you can confirm that data is or is not actually coming in to iFly.