Error - odd number of option parameters?

I'm getting the below server error.

HTML::Template->new() called with odd number of option parameters - 
should be of the form option => value at 11102post.pl line 468

Line 468 reads:
    my $template = HTML::Template->new(filename => $pperror_template);

An earlier instance calling HTML::Template in the same file works 
fine. The error occurs when try to use it later in the script and 
causes the same error even when I copy and paste the earlier working 
code. My guess is that something other than calling the module is 
causing the error but I'm at a loss as to what to look for. If I 
remove the code block below, all works OK including the earlier use 
of Template. Any ideas where to look?

Tom
----------
	my $template = HTML::Template->new(filename => $pperror_template);
	$template->param(
			_pe          => $post_error,
			_wuser       => $post_error_wuser,
			_wemail      => $post_error_wemail,
	);
	print "Content-type: text/html\n\n";
	print $template->output;



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