After upgrade card firmware box stoped connecting

Respected sir,

sir i purchase this box 6 month before .. Box was working fine i see a thread on gsm hostinf to update card firmware .. I upgrade my card then it fails to connect it says the card firmware version is unsupported plz upgrade your card and it open the card update exe then i upgrade again and tried to open octoplus exe again but fails again with same error plz help me as soon as possible

tnx in advance