Ask questions without showing immediate emotion. A challenge to an idea is more easily explained if immediate emotion is not evident. Emotion has its place, but is most effectively used in a controlled manner. If you jump on someone's case immediately, you lose their confidence in you and your abilities.
Instead of looking to you for duifance and support, they will see you as a nag and hindrance. In many cases, others can discover something that you do not see and ishelpful to your issue. If you are impatient and jump past things and demand too much you may miss small kinks that might develop.
It is hard in the beginning to gain the trust and respect of other members. By showing your support and encouragement, you will create the best atmosphere for productivity.