Hello, my DVR card net survillence error on TCP connection failure (-6)
You may want to investigate this TCP/IP repair utility, or use Windows inherent command prompt (ipconfig, etc) to look and correct the problem.
Submitting this link for informational purposes only; I have never had the occasion to actually use it ! http://www.softpedia.com/get/Tweak/Network-Tweak/XP-TCP-IP-Repair.shtml