Files missing from DMG

Hey all, I've got a really weird problem. I've got 3 DMGs of jam packs and 3 DMGs of soundtrack pro audio content. I've installed them on a previous OS. Just opened them all to install on this version and all the main files are gone! There's just help text files in each (before you install etc). If I inspect one it says capacity 8.5GB available 75MB. Can anyone suggest why the main installation icons aren't showing? Could it be a permissions issue or something? Only difference from before is that I'm now on mavericks. Cheers

Also, when the finder window opens, there is a gap where the installation icon should be, so the text file is to the right, where the 2nd icon would be. If I drag select over the space, nothing is there. Strange