Thingworx Edge app in iPhone

I downloaded the thingworx edge app for ios from the store. I also downloaded the sample SteamSensor file from the thingworx website. I know it is a sample app but somehow I cannot get it to connect with server.

I imported the Thing_Steamsensor.xml file into my thingworx composer. Made a new app key with admin rights. I give that key to app on my iphone but it does not connect to the server.

If anyone has connected the sample steamsensor app can you please provide steps or details how to do it.

Thank you