Default Enable OTG Features

Hello!I am new user in xda and i dont know its right place or notand also sorry for my bad englishHow can i enable/add otg support to my device?My device is an unknown device that uses in just Turkish schools named VP10.I get rid of the the restrictions.They gave us the tablet with a keyboard,we can use it and i think that its possible to use otg features on this device, i bought an otg cable but i cant connect my flash disk neither my external hard disk.i can not gave the hardware info because of this
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its android version is İCS and uses ARMv7.İt rooted.

PS:İf you want , i'll give you the boot.img file.
Edit:When i used Usb host diagnostics it had said everything yes but when when i tried to open my usb from a file manager it says empty