So my ibook (which recently got a new hard drive because many have been failing in ibooks and mine was!) won't let me redownload limewire again!! Here's what keeps happening.

I open Safari, I get it to the .dmg
Click the .dmg and it opens and set up begins.
It gets all the way to saying it was successfully installed, but then when I click on the limewire icon, it will bounce in the bottom like programs normally do when it opens and then it will just disappear.

WHAT IS GOING ON?!!?

PLEASE HELP ME!!!