Hy , when i try start Channels.Http , it doesn't work at all , it returns me that Channels.Http is not started .

Code:
ApplicationMessageCenter.Server.Start(Channels.Http);
   if ApplicationMessageCenter.Server.Start(Channels.Http) then
       Dialog.Message("Notice", "yes", MB_OK, MB_ICONINFORMATION, MB_DEFBUTTON1);
   else
       Dialog.Message("Notice", "no", MB_OK, MB_ICONINFORMATION, MB_DEFBUTTON1);
   end
It returns to me " no " witch is for not started
Can someone tell me whi doesn't connect ? Thanks !