When does Allah not answer our prayers?

1. When it is bad for us!
2. When we ask, but not from our heart!
3. When we say: I asked and asked and He did not answer.
4. When we eat, drink, and wear unlawful, food, and clothes,
and property that wa earned either through interest from the bank,
or that was stolen, or if the food was pork, or the like.