Help me restore EM7455B card

Hello everyone, I have EM7455B card. I tried flash some firmware for 7455 downloaded at https://source.sierrawireless.com/resources/airprime/minicard/74xx/airprime-em_mc74xx-approved-fw-packages/#sthash.FY7c2RnA.dpbs
After having downloaded and executed, I received this error.


and I received “No service” state in available network.
image
Please help me to restore it. Before this, it’s working normally.
Sorry for my bad English

how about first typing AT!BOOTHOLD and then run the exe again?