Mounting ISOs for Rosetta Stone

[pyth]

I'm downloading some .iso files to use with Rosetta Stone. I tried simply clicking on it to mount it and it worked, as in the .iso mounted. However, Rosetta Stone said it could not find the disc in the drive. Is there something I'm doing wrong? I also tried mounting it using Terminal with the "hdiutil mount" command.

[Consultant]

It means you need to buy it instead of pirating it.