NIS 21.1 Intrusion Prevention disabled by MS Outlook 2010 sp2?

Hello Community,

 

Checking for new mail in MS Outlook 2010, today I've found that Intrusion Preventions is disabled when I click on the Norton
AntiSpam button located in the upper left side of MS Outlook to access the NIS Network tab.
Norton AntiSpam is enabled but clicking on the first line to the left where there is the Intrusion Prevention options, it appears disabled.
If I try to re-enable it and click on the apply button, it's temporarily re-enabled as checking one more time it comes back again

to be disabled.

I never checked this until today so I can not say if this would ever happened in the past.

 FYI, this happens on my Windows 7 PC which is up to date, I've also tried restarting the computer but the problem still persists.

Is there anyone who encountered the same issue?

 

Thanks in advance for any suggestions on how to solve the problem..

 

Sandro