Sometimes, 'dragging n dropping' presets between the Preset Pack Online Library and the Working Data just doesn't work.
One potential solution to this problem is to the delete caps.xml file of the TC Helicon Device that you are using.
To find it on a Windows PC go to:
On a Mac, it may be found here through this pathway: Your Mac > Library > TC-Helicon > VoiceSupport > NAME-OF-TC-PRODUCT
After deleting, try restarting VoiceSupport so that it can download a fresh caps file.