Suck on what?

I'm trying to get the pronunciation just right so SIRIUS on my macbook understands. Told it "Sakon Nakhon".  It understood "Suck on a Nikon" and said "that's not nice." I've tried everything but SIRIUS keeps telling me "Suck on" various objects.. and "that's not nice."    Tried the Sakorn version, that didn't come out any better. When I asked Sirius for local restaurants, the closest it came to was Bangkok restaurants

Sakon Nakhon