Two red lights on is a bad sign, it most likely means that the flash chip data is corrupted
not easy to tell whether this is PC or Mesa 5I25 related
(the initial complaint about the bad boot sector indicates that the 5I25 card was found but there's an issue with card register access)
Please email sales@mesanet.com with your address and we will issue a RMA and try to send you a new card today
If you return the failed card we can determine what went wrong