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Problem with Polar IR USB Adaptor



Hi,
I am having trouble getting the Polar Infrared USB adaptor to work. 
When I do the following:
result = (*_device)->GetConfigurationDescriptorPtr(_device, 0, 
&configDesc);
I get the following error:
IOUSBDeviceClass::GetConfigurationDescriptorPtr cache was INVALID

Can some one tell me what this means and how to overcome it.

Any help is greatly appreciated.

Regards,
Greg
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