Antivirus 11.1.2.(17) for Mac First scan results - confusing results

Just installed and ran a manual scan.  It produced a report with one line:

 

.../Library/Mail ..... messsages/50006.emlx     Trojan.FakeAV     Infected

 

Whoa.   I tried clicking "repair". Nothing happened.  Only option was to click "Done" and see what other info I could glean.

 

Now all I could see was a yellow triangle warning sign in the Statistics panel and "Virus "50006.emlx" detected" 

 

I click on the red "View Recent Activities"  The Activity Log has an entry:

 

3/30/11 4:08 PM    Manual Scan     1 Problem    /Users ...... /50006.emlx

 

So, I have a "problem"  So,  can I run a repair or a quarantine anywhere?

 

Under Tools, I see Quarantine.  But this produces an empty list.  I have no files quarantined.  This doesn't let me quarantine anything.

 

At this stage:

 

1/  I don't know what kind of problem I have.

2/  I don't know what I can do about the probem.

 

So I go and find the actual email file in the message folder and it was the usual "UPS Delivery" message which had been placed in my Junk folder - so it had not been looked at. I guess "infected" means the file is infected.

 

I can delete this email, but isn't this the sort of thing I should be able to quarantine?

 

It's all very confusing.   Can someone explain where I am missing the Help which tells me what actions can be taken when finding  a "problem" and a "warning!"?

 

thanks