2009 Toyota Corolla LE Immobilizer Error B2794 B2795: Master or Blank Key Issue?

I'm trying to register a new Toy44D transponder key on my 2009 Toyota Corolla LE using Techstream's 'Immobiliser key registration wizard'. When I attempt the registration process, I receive the following errors: > Error Key Registration - The Registration has failed. The communication error occurred between the key and the ECU. > B2794: Unmatched Encryption Code > B2795: Unmatched Key Code These errors appear to suggest a problem with either the master key or the blank key during the registration process. I'm unsure whether this indicates an issue with the original master key, the blank key being used, or a software/communication fault in the vehicle's immobilizer system. Can anyone confirm if B2794 and B2795 errors point to a problem with the master key, the blank key, or both? Any guidance on troubleshooting this issue would be greatly appreciated.