There's only so much you can chase. It's funny that she says that she is interested but did not answer your other texts. It does happen though that women can be interested and still play silly buggers. As my Nigerian mate so eloquently puts it, "The women, they have fish brain."

You asked her if she is interested or not. I'm not sure if I would have done this. Just presume that she is (or has every reason to be), whether she's demonstrated this or not.

It may be that she is shy or it may be that she is full of shit. Either way, if she is interested enough, she will communicate with you.

I don't like this dragging it out via msn balls though and I'm sure you don't either... Tell her to let you know when she is ready. Maybe text her and say, "Give us a shout next time your online."

Have a chat with her, make her laugh, then arrange to meet her.