USB Host Shield 2.0 Mini on Teensy 3.1 gives OSC did not start

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Bobalong

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I'm trying to get a mini USB Host Shield working with a Teensy 3.1 using the USBHIDBootKbd example from the USB_Host_Shield_2.0 library.

Using the board and example on an Arduino UNO I get good results.
Using what appears to be the same connections on the Teensy 3.1 I can only get "OSC did not start".
Code:
 Shield   Teensy
SS          10
MOSI      11
MISO      12
SCK        13
int            9
Shield Power is 3.3v,
Reset is 3.3v,
Both GND are 0v,
The trace supplying 3.3v to USB+ is cut so 5v can be supplied to keyboard.

The Arduino IDE settings are Teensy 3.2/3.1, 48MHz, Serial, Faster.
What am I doing wrong?

Thanks
 
IMG_0091a.jpgIMG_0092a.jpgIMG_0093a.jpg

Red is +5v
Orange is +3.3v
Black is GND
Tests have been run with the Teensy 3.1 powered by its MicroUSB.
 
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