I've been given the following information:
If you have the mag 250 box that could be a clone, do not update it to R22 version and change the settings to disable the auto update function. Apparently, if you update to new version R22 the box will be killed and blocked, and will not run again!
Are you sure the boxes you had were original boxes, and not cloned boxes? Sounds a bit reminiscent of the old dreambox 500 killing days... lol