It does not work again

Boss create fleet, close fleet window, (I see not create EPExternals.xml) wait 2-3 sec and close eve window.
If I switch off network mode not have problem.
18:52:42: FleetMode(242)
* local check (130)
18:52:42 (130) fleetfinder is closed. Opening..., Thread=Processor, Func : OpenWindow
18:52:45 (132) Window opened (fleetfinder). Code 1, Func : OpenWindow
18:52:45 (132) Fleet window parameters. GridButton={X=329; Y=265}, FrameRight=714, CloseX{X=705; Y=269}, GetFleetsButton {X=674; Y=347}, Func : FleetMode
18:52:45 (132) Fleet commander, creating new fleet, Func : FleetMode
18:52:56 (143) Send String: |Tralax1| to {X=399; Y=395}, Func : SendString
18:53:01 (149) Checking: MyCorporationCheckBox, Tick: False, XY:{X=401; Y=511}, Func : CheckBoxTick
18:53:02 (149) MyCorporationCheckBox is OK, C: 0x13, Tick: False, Func : CheckBoxTick
18:53:02 (149) Checking: BasedOnStandingCheckBox, Tick: True, XY:{X=401; Y=616}, Func : CheckBoxTick
18:53:02 (149) BasedOnStandingCheckBox is OK, C: 0xFF, Tick: True, Func : CheckBoxTick
18:53:06 (154) Checking: HideDetailsCheckBox, Tick: True, XY:{X=401; Y=744}, Func : CheckBoxTick
18:53:06 (154) HideDetailsCheckBox is OK, C: 0xFF, Tick: True, Func : CheckBoxTick
18:53:09 (157) Fleet advert not detected, Func : FleetMode
18:53:18 (166) >>>Exception The underlying connection was closed: An unexpected error occurred on a send.
at System.Net.HttpWebRequest.GetResponse()
at vT.YL.Mvk()
at ..( ), Func :
---> 18:53:21: ExitCode 0. Method consumed 36 sec. in 1 runs (average 36 secs/run), Next Line: 900+
---> Desc: Returns 0 if error