Sounds to me like your game isn't really working here.
Does she know you at all? Have you talked to her before hand?
Generally before you can get away with things like this, you have to build up, and she has to know you some more. Prove that you're different from other guys.
If she doesn't personally know you, she might just think you're being creepy...
In fb pictures. A strategy I've used before is finding a very attractive picture of your target, and looking in the background...
"NICE chair. I have one just like it."
Just yesterday I commented on an HB7 photo of her on a couch with a pillow that had wormy things on one side
"I NEED that pillow."
in which she replied with..
"Lmao it's an awesome pillow.. I have 2 so I could prob give ya one
lol"
every other comment was "what r u doing", and "cutie"
I'm proving myself different now. She even offered to give me one (now obviously that's not what she meant. She wants to keep me in 1 to 1 conversation to see what I say next)
Recognize and talk about anything BUT the target. Works like a charm.
Depending on how many times you've posted one liners on her pictures, you'd best give it a break on that one.