Samapada,
You should be wise enough to know that Now2Ami will not suddenly stop, or suddenly start working. There has to be a cause. So answer some questions:
1. How long have you been using Now2Ami?
2. Has it given this problem before?
3. Had AmiBroker closed (could be by mistake) when quote updates stopped?
4. Do you use Now2Ami all through the trading session from 9:15 to 15:30?
Also, most of the time one has to guess what you are trying to say. But I know that you can write with more clarity.