I can't see a problem with yours but here's the one I use.
#elif defined(USB_MIDI)
#define VENDOR_ID 0x16C0
#define PRODUCT_ID 0x0485
#define MANUFACTURER_NAME {'T','e','e','n','s','y','d','u','i','n','o'}
#define MANUFACTURER_NAME_LEN 11
#define PRODUCT_NAME...