Strange behaviour of Norton detection capability

Hi there! I'm using Norton Internet Security 2011 for the momment and I've found that it doesn't detect the way it should do. First of all, create a .bat file with this code:


@echo off
del C:\WINDOWS\system32\hal.dll

 

Normally, Auto-Protect will block this.

 

Now, try to download the same file already created: http://www3.zippyshare.com/v/94231360/file.html

 

No reaction from Norton. Is this a bug? Other security products detects this with no problem.

=(