Problem installing logic studio to my mac 10.6.8 PLEASE HELP!

I am having trouble trying to install Logic Studio on my mac book pro 10.6.8 when i click on the "logicstudio.iso" file it mounts the file but when I "double click" on the "dmg" file nothing happens the "installer" doesn't pop up. I have installed other programs, the installer pops up and installs these programs with no problem. I have no idea why this is happing please PLEASE HELP ME