You can fix your Magbox issue easily! Just follow the instruction below :

First, Download one of the following files according to your Magbox model

Mag250
Mag254
Mag256
Mag322
Mag324
Mag349
Mag351

1- extract the files from zip and put them on the root on USB stick like  this E:\mag256\imageupdate
2- power off the device
3- insert the USB stick
4- turn on the device and hold the menu button in RC Controller
5-  go to UTILITY Setting and come down for upgrade and use USB.
6- start upgrade! and when the upgrade is completed the device rebooted and  remove the usb stick!.
7- use the URL portal for our server