AVFoundation gives me framework error in iOS5.1 xcode 4.3.3
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i want to play my audio when the application start but the sound not playing and xcode gives me this error :

    2012-07-16 17:23:42.126 SoundSound[2029:10703] Error loading /System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn:  dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn, 262): Symbol not found: ___CFObjCIsCollectable
      Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security
      Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
     in /System/Library/Frameworks/Security.framework/Versions/A/Security

also, when i check my console, there's lot of error about appleHDA.kext error loading. please help me to solve, it so frustating me. I already check and search i found that it seems about iOS5.1 bug. is there anyway to play my audio when apps is start? please help.