After upgrading the firmware, the error still pops up. I conducted some research on this board; noticed I wasn't the only one with this problem. Backstory, I optimized a project's bitrate from 8.0 (5.5GB) to 5.0 (4.4GB). Then, this error message stopped me from burning. I cut the project almost in half with Vegas 4.0. The total amount of project was 2.8GB. I proceeded to prepare and burn. Guess what? The project worked perfectly.