Lumia 909: Some apps fail when on WiFi only

I want to use my Lumia 909 as a WiFi only device. The phone account it was attached to has been deactivated. A lot of the apps have no problem with this. Mail, news, OneDrive.. all work just as well on WiFi as they did with the SIM card in. But apps such as The Weather Channel and Pandora throw "can't connect to the internet" messages. Is there a setting I'm missing?

Thanks

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