$DIR_INPUT="./CAPTURE";

while($i <= $npages){
		$FILE = $i . $IN_FILE;
		&wget($URL . $PAG . $i, $FILE, '', '');  #sub that call the wget
			&capture($FILE);
		}

...

sub capture{
my $FILE = $_[0];
$fileContent = ` cat $DIR_INPUT/$FILE `;
print $fileContent; # Here's where it stops
...
}