Why other software can do function XXX and your software can't?
Every software is unique and different, just like every person is.
This is like asking "why other people can do XXX and you can't?" and this just might not the right question.
Most important of all, this does not help anyone getting any closer to the real answer. What was unknown remains unknown. On the other hand, you might be interested in learning about actionable information, or think about how you can help about this situation.
Check these topics to find out the answers you need: