As I stated my problem here https://community.tp-link.com/en/business/forum/topic/509700 as well as based from reading other Tp link user. we have a common problem and unfortunately we can't fix it anymore. So what I have in my mind now is to give up the radio but use the antenna. now i'm looking for a new radio variation that might be compatible with TL-ant5819MS. preferably not WBS510 because of my disappointment with the product. Thank you in advance