How do I reinstall Logic Pro 6 ?????

[vindig]

I currently own a Power Mac G4 desk top and I was still running Logic Pro 6, However I recently had to reboot my computer erasing some files and Logic was one of them. I have tried to reinstall Logic Pro 6 and for some reason it is still not working. A pop up comes on the screen and says no text found when I click to open it. Did I reinstall it incorrectly???

 

Thank you