well if the script ran fine on another zgemma and everything was fine, why don't you take a full backup of the image with the script installed from that other box (the one that the same script works fine on as you mentioned), save to a properly prepared usb flash drive stick and then flash your box that has developed the problem, flash it using the full backup from the other box if you know what I mean.
Is your script a multi room script or something as I'm wondering, I would imagine for each IPTV box you have you will have different scripts for each one (if all bought fully loaded etc), not the same script and the supplier would not be happy at all at you using the same script on two boxes at the same time as thats not allowed and he will see it and know it too, thats if it even worked, if it did work he could block it and block you too, so watch out and be careful.
Unless your sure you can use that same script and your provider says thats fine then DONT do what I suggested until you find out for sure if both boxes have different scripts, I would imagine they have but there again, I am not sure how multi room scripts work, maybe they can be used on a couple of boxes, I dont know as I dont have one, not yet anyway.