Help Installing Bit Torent Mac 10.7.5

[flyercvg]

My HD crashed and now when I try and install Bit Torent I get the error; :failed to attach to disk image file"

I'm certain it may be a permissions problem but I can't put my finger on it.

 

Read about turning off the firewall for installation, but now it is showing the install process going on 5 minutes. Speed test is showing 9.55 MBPS so I don't think it's a network problem