Cannot boot from LiveCD

Hi! I’ve just downloaded a 64-bit LiveCD. I tried to boot it on my desktop, but it failed. The boot splash screen appears, but no progress bar moving. I tried the fail-safe mode, but it did not help. I checked the media, but it was OK. Anyway I wrote the image to another disk, but still have the same troubles. In the console there is a strange message ‘Failed to mount read-only file system’ I am just guessing what it may mean.