Info: [debug] [INSTSERVER] Instruments exited with code 253

Hi, i`m trying to run a file .ipa in appium, but return me error

info: [debug] [INST STDERR] 2015-07-31 12:39:00.583 instruments[681:9487] WebKit Threading Violation - initial use of WebKit from a secondary thread.

info: [debug] [INST STDERR] Instruments Trace Error : Target failed to run: Permission to debug com.unique.Hello was denied. The app must be signed with a development identity (e.g. iOS Developer).

info: [debug] [INSTSERVER] Instruments exited with code 253

info: [debug] Killall instruments
info: [debug] Instruments crashed on startup
info: [debug] We exceeded the number of retries allowed for instruments to successfully start; failing launch
info: [debug] Stopping iOS log capture
info: [debug] Running ios sim reset flow
info: [debug] Killing the simulator process
info: [debug] Killing any other simulator daemons
info: [debug] Killall iOS Simulator