Check if it is HY or not, and flash away: http://www.androidtablets.net/forum...let-information-firmware-custom-recovery.html
Thank you very much for the information.
How can I check if it is HY or no?
I believe that the HY models have 4GB of internal Flash storage. From the link you provided it appears that yours should have 2GB. You can confirm this using the Settings tool on your tablet.