Try to update idol using this:
TRY THIS ROM
PROCEDURE:
1 unpack them with winrar, inside the STM712HCZ_20130306_V1.0.11.SDFix_HR are two important folders
2 /Temp/image inside the image folder you must put the kernel.img you have extracted from JK-CM10-Pascal2-oc1104_20121203
3 Now with the tablet off run as an administrator(for win7) or just run (for win xp) the RK29update
4 now holding down the (-)volume button insert the usb cable and wait to see if windows automatically installs the drivers if not do it manually necessary drivers are in USB Driver
5 after the program (RK29update) recognizes the device click on eraseIDB
6 when step 5 is finished check kernel and find the kernel.img you have placed in the folder of temp/image
7 check the box for loader and click run
8 wait about 5 minutes after which the device will start to boot
if it boots to cwm just click reboot device using the volume buttons as up and down and the power button as ok.
enjoy