Ken,
I used one that was highly praised elsewhere (found it on different websites, not a gardening site though) and it worked temporarily.
I ended up taking a drastic measure that I wouldn't recommend. It worked, but I'm surprised I didn't kill the plant. So, to learn of something else that someone has used and know it works for them is a plus.
Mine were the same small "sugar ants." Stubborn little boogers. I'd take them over fire ants though.
Planto