Problem in xamarin Studio submission 64 bit app to appstore
I work with Xamarin Studio. I transform my app with Unified Api and changed my supported architectures to "ARMv7 + AMRv7s + ARM64".
Rebuild and it's ok but when i submission my app to appstore, i receive always:

"Missing 64-bit support - Beginning on February 1, 2015 new iOS apps submitted to the App Store must include 64-bit support and be built with the iOS 8 SDK. Beginning June 1, 2015 app updates will also need to follow the same requirements. To enable 64-bit in your project, we recommend using the default Xcode build setting of “Standard architectures” to build a single binary with both 32-bit and 64-bit code."

I enable 64-bit for AppStore configuration, what's the problem? Can help me?