I guess that there is no image matching what you tell us. Have you tried pasting the HTML into a separate file to see if it matches what you think?

I can only recommend to you to make your code more robust by using the following:

my $image = $ie->getImage('alt:', "Incidents");
if (! $image) {
    die "Couldn't find 'Incidents' image on the current page.";
};
$image->Click();
[download]

As an aside, I don't really care if this is "blocking your work", and queries are not "treated as important" here based on your saying so.