You can either follow the instruction of #16 to hack it to all-code. (I tried that before and it works).
Or, you can downgrade to 1.07. But you have to save the "UPG" folder under the root directory. I've attached the procedure for your information.
If it still cannot regconize the file. You need to change the file name from BDP950055-XXXX to BDP950012-XXXX or from 12 back to 55 each time you upgrade.