Guys,

The thing is that i have a backdoor (not created by me) and being a new version of this backdoor i got it to test it from a Windows XP to a Windows ME PC. And know what?... when i was sending the server through the LAN to the WinME PC, Norton automatically scanned the file and found the virus as backdoor (.......), OK. But this only with the last version of this backdoor. I mean that i can still use an older version of this backdoor and it doesn't matter if i send or manually scan the server or the client, Norton doesn't realize that is a virus. Besides, once the server is installed there's no easy way to erase it because Norton finds no viruses when doing a whole scan to the "infected" computer.

My question is, could this be an "enormous" mistake of Norton? How could it be possible that Norton finds the lastest version of this backdoor as a virus but not an older version of the same backdoor?

Thanks.