Android FASTBOOT via USB OTG? - android

I have a windows 8.1 tablet that only has a mircoUSB connector.
I've installed adb & fastboot drivers.
If I connect my Nexus tablet to my Windows tablet via OTG & USB Cables, it's detected fine when the Nexus tablet is booted normally.
I can run adb and browse the Nexus table without issue.
However if I reboot the Nexus tablet to the bootloader and then connect it to the Windows tablet, I get a quick connection sound and an instant disconnection.
Nothing appears in Device Manager.
Same Nexus tablet on a Windows 7 laptop or Windows 8.1 PC works fine in bootloader mode.
So what am I doing wrong on the Windows 8.1 tablet ?
Should this work via OTG ?
Is it a driver issue ? if it is how do I install the driver when nothing appears in device manager ?
Thanks

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Windows 7 can't detect ADB device

If I plug in LG Nexus 5X to computer with Win7. I see only one device. It's MTP.
USB\VID_18D1&PID_4EE6&REV_0310
USB\VID_18D1&PID_4EE6
But when I plug in the device to computer with Win8 the system detects 2 devices:
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and
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Install drivers for your phone by installing SOny PC companion, istall adb adb and fastboot from this link
https://github.com/koush/UniversalAdbDriver
Den use any tool you wish , best tool is
http://forum.xda-developers.com/showthread.php?t=1886460

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I'm using the Eclipse ADT bundle on Windows 7 32-bit.
I'm trying to run my app on my phone (Motorola Droid Razr Maxx hd) which is running android 4.4.2 kitkat. I Have turned on USB debugging on the phone, and have installed drivers. But the eclipse doesn't show my device. here is the
My Apps min sdk:8 and Target sdk:19
I know there are similar questions
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but these doesn't solve my issue.
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Turned off USB debugging.
Not installed drivers for this specific phone model (as far as I remember, old motorola devices works with drivers from Motorola, not the Google's one.
Check connection - I had some troubles when connected phone with some low quality USB cable.
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After I installed the latest driver adb could find my devices again (verified by running adb devices on the command line)

Samsung Galaxy Nexus doesn't appear under adb devices on OS X

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Ensure that your phone is set to connect in PTP mode, not MTP mode.

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