@sanda12. Do me a favor and go into your "profile" and put your location, city/state/USDA zone. Location can be so important when asking questions or giving advice. Once you have entered this info., each time you post something, we'll know where you are.
@Carter is exactly right. We'll have to know your growing conditions and your growing routine in as much detail as possible. As they say: "A photo is worth a thousand words", so show us some photos of what's going on.
You have perhaps seen some of the posts and some of the photos of my (now) 14 mo. old Adenium obesum plants. Apparently, this is what you want to see. In reality, you have been growing Adenium plants longer than I, so I sure can't say my success was due to knowing anything special. I am strictly a novice when it comes to these plants.