I just visited your forum. How long have you had it? How have you promoted it. One thing I did notice is you have twice as many members as you have messages. That is unusual. Do you have a lot of inactive members who just come there for information.
Site is 3.5 month old.
Started as interest to share knowledge.
Around 30 like minded people join togather for the good cause to share knowledge with all.
I invited around 50 peoples via facebook whatsapp. Discussed idea and plan about it.
After that 30 people left who showed interest for doing this by investing money.
Out of this 20 were interested to invest and 10 to share knowledge + invest
We started forum on 7th Sept 17.
All people did marketing by sharing links in groups and on fb wall.
Some people did posted unique content, which attracted users.
Maximum users are not familiar to how to use forum so they only do visit, download or read content and goes back. Hardly few ask questions or reply or share there content.
We are planing to make posts on how to use forum
How to share content
And some tours for website to make user understand everything.
Theme we use is still buggy, once it is stable and modified, further guidelines for user will be made.
Now many people knows about it, still we are increasing our reach to peoples.
Civil Engineers are little more busy people so they wont visit daily but come back as and when they are in need of help.
I too busy person, but when i get some free time i do post on my website as well as at xF.
Running a forum is not a job of 1 person, unless you have a team of people who wish spend there free time in contributing, forum is dead.
My team spent 10 minutes a day at any time of day on forum.
I think my forum is not yet off the ground.