Doesn't work in what way? Doesn't download? This is a new master drive you have and not a slave?
What about archiving? In your current set up right click the button in Impulse of the game you want and select 'archive'
Transfer the archive to the new drive and install Impulse. Click on the orb top left in Impulse and select 'restore archive'.
If it a new slave drive then you can copy the game folders across to the new drive and change the install location in Impulse to match.
