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HID over GATT in Windows 7 with Bluetooth 4.0 USB adapter should work, or not?

Hi, I'm just starting to learn my ways around the nRF5182 SDK, my goal is to implement a device with HID profile using this device. The device must work with Windows 7 (until 3rd party apps migrate to 8) so I bought BT 4.0 USB adapter from IOGEAR (GB521). This adapter driver installs successfully and creates Bluetooth stack with a Broadcom driver and the Microsoft BT enumerator. So far so good. Then I successfully compiled and loaded the HID mouse sample code into the SDK. I verified with the emulator that all three services run OK, however, when I pair it with the GB521 it installs initially three unknown devices in the Windows device tree. Eventually the battery and device info services are installed by windows, however the HID service remains unknown and Windows claims that it can't find a driver for it. I double checked and even simplified the device descriptor to a bare bones mouse. Everything seems to be right. I also checked in MSDN and found this page about BT support in Windows versions: msdn.microsoft.com/.../dn133849(v=vs.85).aspx HOGP - HID over GATT Profile is listed among the in-box profiles supported by Window 7. Bluetooth 4.0 is provided by the GB521, and it supports the GAP profile, so, what am I missing?

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