Can't connect to Foursquare with mobil Data

[18g]

I don't have problems with other apps, but for some reason I can't connect to Foursquare with mobil Data. If I turn on Wifi, all works fine. So I downloaded 4th & Mayor, and same thing, it only works with Wifi on, not with data. All other apps works just fine with data. Any help with this much appreciated. Is there some hidden setting i'm missing?

I have a Lumia 720 with windows 8.

 

[Miguel Costa2]

I have the same problem in my lumia 620....