Run app on device on second app

I've made my first application which ran fine on my iPod touch and on my iPad. Now I'm in the process of making my second app, but Xcode won't let me run the app on my device. When I plug in the device, it just does't pop up in the device menu (where you choose the simulator etc.), but it still works fine on my first app. Is there开发者_运维知识库 any additional configuration I have to do?

Yes, you have to be sure that you have installed a provisioning profile that match your application's identifier.

Check Managing Devices and Digital Identities

Also, in the Xcode Organizer, you have to enable that device for Development (there's a medium size button button for that when you select the device in the Organizer). If you are using Xcode 4.1+ that device will automatically be provisioned for you.