Introversion

I finish hacking the lan then I get access to main server I stoped all security
(proxy and monitor)

I have trace tracker and when they start tracing me i have got more than 100 second but they trace me in less than 20 second and they disconnect me. is there something wrong in the game or i am making wrong steps

i am sorry for my english

Neither one actually. When the trace starts, the system admin logs in, and starts tracing you from where you entered the LAN. If he gets to the same node you're in, HE disconnects you, no matter how much time you have left on the trace.