That's AFC material, my friend. You need material that really stands out somehow -- whether it's funny, challenging, cocky, or creative. Check out these threads for some examples:
perfect-internet-game-woah-vt39020.html
the-mirror-opener-golden-vt27379.html
There are a number of other threads with more. Scan around, find something that either suits your personality and that of the girls you're targeting, or use those patterns as inspiration to develop your own.
Every message you send needs to say something interesting (without coming off as try-hard). That's how you make them interested in you. Until you give them reason to be attracted to you, you're just another nice guy bugging them.