Can't change patches when local is turned off, using Logic X

Hi,

I’ve set up the Slim Phatty (via my RME Fireface UC) to be controlled by the “External Instrument” device in Logic X. Everything works fine (note on/off, the various controls etc) all except changing the patches. With the “local”, on the Phatty, turned off, i am unable to browse the patches.

Anyone know what i have to do to sort the problem? (aside from turning the local on every time i want to change the patch?)