Android Question B4A bridge continuously connected and disconnected

Are you running multiple instances of the IDE? They will try to "steal" the connection.

No sir, only single instance only

hope anyone can assist me, i also tried it to my other old mobile phones the same results shows...connected then immediately device is disconnected, this happens over and over when it tries to reconnect again.

Maybe you have a problem with your firewall or antivirus...

Thank you everyone...I will check all your suggestions.?

It is also worth resetting everything from time to time (also wi-fi router)...

I had the same issue when I first installed B4A, unfortunately I don't know what I did to fix it, or when it started to work correctly.

I did though make several false-starts on the installation procedure ( https://www.b4x.com/b4a.html ) thinking I know better, and went beyond those instructions.
I suspect it was a bad installation set-up that caused B4A Bridge to fail AND it caused MANY other issues.

It is essential to follow @Erel 's Set-up instructions. Do everything there exactly - do NO MORE, do NO LESS, make NO ASSUMPTIONS!
Using 7-Zip to extract all archives is ESSENTIAL as Windows built in Extract often/usually/always corrupts the extracted folder structure.

Good day everyone...its already working. I just followed the instructions of someone's post who had encountered the same problem. while in USB mode, I run and compile one of my sample and instantly the B4A bridge works. Thank you everyone for all your help and suggestions.?