Hi all, I'm adding DRM support to my avstream driver and seem to be hitting a snag. I have implemented the KSPROPERTY_DRMAUDIOSTREAM_CONTENTID property from the KSPROPSETID_DrmAudioStream property set on my pins, but if I run the Digital Rights Management test from HCT 11.2, on startup, the test reports two errors for my driver when it calls DRMKAuthenticate: c:\windows\system32\drivers\mydriver.sys - AuthNoCert (0x00000001) c:\windows\system32\drivers\mydriver.sys - AuthBadImage (0x00000006) I would expect the first error, since my driver is not certified yet, but the second error, AuthBadImage, seems to be preventing the other tests from running. Am I missing something that is causing that error? Thanks for any help, Jeff