help with a .dmg file

[swordfish5736]

I've got a program install that i guess is corrupted. It wont run when i try and open it thru the finder and i've even tried using toast and it just says its unmountable

 

[xUKHCx]

I've got a program install that i guess is corrupted. It wont run when i try and open it thru the finder and i've even tried using toast and it just says its unmountable

can you re download the program .dmg file, it is possible sometimes for it to be corrupted in the download process although it is very rare.