Question [Q] Note 2 Charging with HP Touchpad + OTG Cable not work

Hi,

i want Charge my Note 2 with HP Touchpad over OTG Cable.

Note 2 / Omega Rom Android 4.3 / Devil Kernel
HP Touchpad / CM 9 Android 4.0.4

I can Charge the HP Touchpad with my Note 2 but i can`t Charge the Note 2 with my HP Touchpad.

Note 2 -> OTG Cable -> Normal Cable -> HP Touchpad = Charging HP Touchpad
Note 2 -> Normal Cable -> OTG Cable -> HP Touchpad = No Charing my Note or Touchpad.

Any Idea why the Touchpad is Charging and the Note 2 not ?

And Sorry my English is not the best