Deploy a project on iPad mini with Xamarin Studio 5: error

I've developed my app with XS6. XS6 doesn't work, there are a lot of errors. I could deploy my app for a while on my iPhone and iPad but now it's impossible to work. Then I decided to use the old Xamarin Studio 5. I open the solution in XS5 and I can work and deploy my app on the simulator. When I try to deploy it on a real iPad I have the following error:

error MT1006: Could not install the application '/Users/enricorossini/Projects/myInspection/iOS/bin/iPhone/Debug/build-ipad2.5-9.3.2/myInspection.iOS.app' on the device 'iPad di Enrico': AMDeviceSecureInstallApplicationBundle returned: 0xe8000087 (kAMDIncorrectArchitectureError). The application was terminated by a signal: SIGHUP

I tried to use Xcode to deploy my app on the device. I receive this error in the following image. I have an iPad Mini.

Then I try to deploy the same project on my iPhone 6 and it is deployed with no problems.

Has someone an idea? Thank you in advance.