I'm getting an "invalid address" error when attempting to solo mine. Coin is GlobalBoost.

BFGMiner 4.4.0, OS X Mavericks w/ Zeus Blizzard.

Cmd line: bfgminer --scrypt -o http://127.0.0.1:port -u user -p pwd --coinbase-addr GYLaG8VgEwHjfLWvYnyCGCzQgMVHMbEo87 -S zus:/dev/cu.SLAB_USBtoUART

What am I missing ?

Thanks,
~ Jay