The map seems to be correct but the name is wrong. I think this is referring to Long Fu vegetarian. It's open from 3pm onwards, not 11am as mentioned above. Friendly owner who speaks a little English. There is also a yoga space upstairs.
See http://www.renegadetravels.com/vegetarian-restaurants-silom-bangkok/ for directions and images to help you find the restaurant.
Cons: Not open at lunchtime