Package ios 4.4.3, Code Sign Error

i have put the .mobileprovision in the Build/IOS folder, also set the info.plist bundle identifier to com.epicgames.myprojectname.
i created a first person template project to test, it can launch on my device.
but when i run my project, that copy from the windows,it shows like this

Did i miss something?
Could anybody help?
Thanks a lot.

btw, i use xcode 6