On my PC, each time i request iTunes Match (for which it appears I have already been registered and billed) error message 0x800B0109 appears (specifically "We could not complete your iTunes Store request. An unknown error occurred (0x800B0109). There was an error in the iTunes Store. Please try again."), such that my iPhone 5 registers only iTunes purchased and not my entire iTunes library. Can someone help me with this frustrating situation, please?.