Help bricked iball slide 6318i

I have successfully rooted the tablet

Then i extracted recovery.img using recovery dumping method
and then using that i created clockwork mod recovery using clockwork mod builder . i put the recovery in sdcard
and flashed it using terminal emulator
Quote:
Quote:
su
dd if=/sdcard/recovery.img of=/dev/mtd/mtd3
it showed successfully transferred the files
and when i boot into recovery it bricked It is showing black screen
when i connect it to usb cable it shows unidentified device
becase it is iball i cannot get the stock firmware any were

device specifications

Hardware :rk2928 rockchip based
PROCESSOR :arm cortex a9 1.2 ghz
Os :JELLYBEAN 4.1.1
Ram : 1gb ddr3
i do have system.img
recovery.img
data.img