Treemodelfilter and row_separator_func problems

[redtux]

I am having difficulties with row_separator function in a filtered view. This is my function (in perl)

$ctl->{view}->set_row_separator_func(sub {
		my ($store, $iter) = @_;
		my $iterm;
		my $modelst;
		if ($modelr=~/Filter/){
		$iterm=$modelr->convert_iter_to_child_iter($iter);
		$modelst=$store->get_model;
		}
		else {$iterm=$iter;
			$modelst=$store};
		my $row = $modelst->get_path($iterm)->get_indices;
		
		if ($ctl->{sep} == 1) {
			if ($row =~ /\d*[13579]$/xsm) {
				return 1;
			}
		}
		else {
			return 0;
		}
	  }, undef
);

It runs but no row separators in view. It works perfectly with a non-filtered view.

any ideas appreciated