K3B made a 408.8 MB iso file so something is on there.
I think you burnt this CD incorrectly, you should have burned the iso as an iso
, not as one big file ending in the letters .iso
K3B has a special option for this, in my case it is called "Burn CD image". Then point it at your iso file.
Then, when you load the correctly burnt CD, you will see all the individual files.