I have a BB curve 3G. I have the most recent system. Previously I had Sprint Navigation installed, all worked well. Recently I opened the application and I get a screen that says: ‘A new version of Sprint Navigation is available. Upgrade now?’ I have options of ‘Upgrade Now, Remind me later, Don’t ask me again and the upgrade now’ is highlighted. If I click Upgrade now, nothing happens ever. If I click the others, the device blinks quickly then comes back the same screen with ‘upgrade now’ highlighted again. I have deleted the application, rebooted, downloaded the application, installed it again and rebooted. How can I upgrade my Sprint navigation? Please help. Thanks.