Default Kingo Root not working anymore...? help... plz

Hey peeps, like a month ago I got my Ceros Revolution rooted with the 1.2.0 version of the Kingo Root software. The thing is that after messing with some roms and stuff, I finally decided to return to the vanilla version of the tablet but rooted...

Unfortunately, the new version 1.2.2 no longer works, it reads my tablet and everything but it takes a long time to fetch the scripts, after a while of waiting, the program tells me that the Rooting failed because there was a server error... I dont know what exactly that is suppose to mean.

All I did was, reinstall the original firmware .img files, install the windows drivers from rockchip and set the USB debug mode on...

If anyone know anything about this issue, plz let me know. thx