From a woman's point of view, if she was interested in you, she'd be chatting to you. Sorry, but it means she's just not that into you. I would say that's her way of not being a total bitch by ignoring your message completely, but not giving you any real opening either.
Please don't waste your time on women, no matter how gorgeous they are, if they don't show IMMEDIATE interest in you. If they don't respond to your message in a positive way, they are either being polite or just want attention.
I'm sure you're a great guy - and I don't want you to waste your time hanging on a smily face from some random girl like she did you some kind of golden favour.
In the meantime, check out my 5 free tips on how to improve your profile right now. It may help.
www.profilediva.net
All the best,