Besides your problem (which, as Abigail-II notes, is not apparent from the piece of code you posted), that is a horrible construct - flag variables like $errorcount are a red flag, as are collections of $foo_bar, $foo_baz, $foo_quux variables. An initial cleanup leads to:

sub print_error {
    my $message = shift;
    print "<br><font color='red'>$message</font>";
    # etc..
}

unless($title and $url and $description and $keywords) {
    $title
        or print_error "Please enter a title.";

    $url
        or print_error "Please enter a valid address.";

    $description
        or print_error "Please enter a description.";

    $keywords
        or print_error "Please enter some keywords.";

    # ...
}
[download]

You could still do a lot better if $title, $url etc where all stored in a hash. See Mark-Jason Dominus' excellent Program Repair Shop and Red Flags article series on Perl.com.

Update: thanks to The Mad Hatter for catching a small mishap. (s/$shift/\$message/)

Makeshifts last the longest.