Unhappy Hello last hope in xda developers serch alternative firmwear

Hello after I have some problem with stock firmware in mine tablet jay-tech 799 spec:
Display 17,8 cm (7') resistiven TFT.
Betriebssystem Android 2.3
Prozessor iMAPX210 800 MHz
Arbeitsspeicher DDR2 512MB
interner Speicher 4 GB
HDMI Ausgang
WLAN Wi-Fi IEEE 802.11 b/g/n
eingebauter Lithium-Polymer-Akku
Frontkamera 0,3 Megapixel
Anschlüsse Mini HDMI, 2 x Mini-USB, 3.5mm

I try reflash firmware downloaded from official website bu unfortunly I have bootloop and can't enter recovery etc.
I try all rom's from je-tech.de and always get error after flash
Factory initializing ...
E:format_volume: no MTD partition "/dev/block/mmcblk2p3"
E:format_volume: no MTD partition "/dev/block/mmcblk2p5"
I try also alternative firmware downloaded form:

but after flash I got error system file corupted.

Can someone can help me find alternative firmware to bring to live that old usless piece of .....
Phone: Samsung Galaxy S III
ROM: Sotmax JBean V10
Recovery: CWM