If this is happening a lot, then it's a signal that your "capture" bit of daygame (attention snap, compliment) is not 100% solid.
Shy, maybe, but in my experience it means something's wrong...she didn't "get" the opener.
Some pointers to try:
* super strong eye contact (soft) combined with a cheeky smile
* s.l.o.w your voice down and watch out for inflections
* don't pause between compliment and statement - captivate her with your story about her
Hope that helps,