ZTE KIS roamer 2 problem :(

[Guest razor1991bc]

Hello everyone , i'm sorry i bother you at this hour but i have a big problem.

I have installed firefox os via update.zip http://firefox.ztems.com/

It worked fine no problems ,and then it requested to update software , i clicked ok then after install it just boots up shows firefox then flashes a few times and screen goes blank , buttons still vibrate when i p ress them

I tried applying the older firmware via the volume up + power , but when it verifies signature it aborts installation what can i do , i hope i did not brick my phone :-s