I'm not a Win32::OLE user, but that loose curly bracket looks suspect:

$chart->ChartType} = xl3DColumnClustered;
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I tried to throw your code into a file like this:

use strict;
use warnings;
use Win32::OLE;
my ($vtfalse,$sheet);
# Create the chart #
my $chart = $sheet->ChartObjects->Add(1, 175, 457, 300);
$chart->ChartType = 'xl3DColumnClustered';
$chart->Chart->ChartWizard({Source =>$sheet->Range("D5:D12")});
$chart->Chart->SeriesCollection(1)->{Values}=$sheet->Range("D5:D12");
$chart->Chart->SeriesCollection(1)->{XValues}=$sheet->Range("B5:B12");
$chart->Chart->SeriesCollection(1)->{Values}=$sheet->Range("D5:D12");
$chart->Chart->SeriesCollection(1)->{Name}=$sheet->Range("B5:B12");
$chart->Chart->{HasLegend} = $vtfalse;
$chart->Chart->{HasDataTable} = $vtfalse;
$chart->Chart->SeriesCollection(1)->{HasDataLabels} = 1;
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but I still get errors.

Can't call method "ChartObjects" on an undefined value at K:\Desktop\3
+d-chart.pl
 line 7.
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Guess I'm missing something else. Can you post some minimal complete code that illustrates your problem?