Terratec T-Stick+ oddity in Windows 8

Hi. As it appears, the Terratec T-Stick+ is supported properly in the latest releases of osmocom's libraries. I have a T-Stick+ working properly in SDRSharp using the latest version of the standard zadig drivers as everyone on Windows uses. When i downloaded the latest osmocom Windows binaries from here: http://sdr.osmocom.org/trac/attachment/wiki/rtl-sdr/RelWithDebInfo.zip, i get the following result when i run rtl_test.exe on a fully-patched Windows 8 64-bit OS: C:\Users\user\Downloads\RelWithDebInfo\rtl-sdr-release\x64>rtl_test.exe -t Found 2 device(s): 0: Terratec T Stick PLUS 1: Terratec T Stick PLUS Using device 0: Terratec T Stick PLUS usb_open error -12 Failed to open rtlsdr device #0. I've tried this both as administrator and as a normal user, btw. Curiously enough, HDSDR also can not locate the device for some reason no matter what I do, and i've installed the zadig drivers on BOTH tuner instances just to be sure... Somewhat perplexed... Can anyone offer any advice? Cheers Peter Dohm