well you could always message them and see what their schedules are like. maybe they are on opposite sides of the country. maybe they work a 3rd shift and you guy's are on at total different times.
maybe hit them up with a private party and invite and see what their situations are. maybe they don't understand how to properly operate the forums? i know for me i never really used forums before CAG. and certainly not as frequently as i use these ones.
i always find it best to ask questions.