Q for any Luxman L-509X owners

For anyone with experience with the L-509X - does the "Separate" button work on your remote?

All of my remote buttons on the RA-17A remote are working except the Separate button - it doesn't work. I have to walk across the room to push the "Separate" button on the unit. 

Just wondering if I should contact Luxman about a replacement remote or if this is just the way it is?

Thanks!