Setting new POST_MAX or MAX_BODY

I'm trying to raise my post maximum and keep getting this error:

[error] [client 127.0.0.1] (20014)Internal error: Content-Length  
header (959543540) exceeds configured max_body limit (67108864)

How do I set max body higher?  So far I have:

sub handler {
	my $r = shift;
	my $req = Apache2::Request->new( $r, POST_MAX => "500000000",  
MAX_BODY => "500000000" );
}
1;

What am I doing wrong?

Thanks,
Boysenberry

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