Works well on CDs, DVDs won't accept file into the file system in windows burning wizard

So yeah. CDs work fine.

But since I updated my firmware from 2.14 to 2.19 to burn DVD-DLs, the thing won't even accept files into the "file system" in the windows burning wizard. So, it comes up like a blank disc, and when anything goes into the folder to burn, the error message comes up, and nothing goes in the folder.

Programs that burn for themselves will write, but they won't write to the disc's boot sector, where it tells the machine what to do with the disc.