Thanks Naveen on prompt reply, much appreciated.
I am using gps-server.net v3.7, I am worry that the problem is acknowldged by my server.
I am contacting support from gps-server.net however no answer yet.
I am trying to see the log file, however nothing much I can done with it as I can not read it.
Do you have any idea on certain tool to get the data: imei, lat, lng and other avl ?