Nokia :: X6 Does Not Use Wlan

So I picked up my brand new X6 today, and it's a really great phone. However what I notice is that for certain apps like the ovi store or maps, I cannot choose a connection which it should go through, and it always connects through my operator's network instead of my WLAN which is in range...How can I change connection behavious for these (and other) applications? I already set my connection order to Wlan first and then the operator connection, which works fine for ebuddy to give an example...so what's wrong with the other stuff?