I am having IoGetDeviceInterfaces troubles!

I have a kernel mode driver that is trying to send an IOCTL to the defualt
audio device. First I call IoGetDeviceInterfaces using the KS_AUDIO_DEVICE guid.
It returns a list of symbolic names. When I give the first symbolic name
(our default audio device), to IoGetDeviceObjectPointer it returns a status
of STATUS_OBJECT_NAME_NOT_FOUND. Can someone give me any ideas why it thinks it is not there when it obviously tells me it is?


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