Confusion reigns here for the moment. My query asks for two bind variables and I give it two. What might this mean?

My test script throws these errors:

UPDATE asd_call_lists SET queued = \'t\' WHERE phone = ? AND userid = 
+?;
DBD::Pg::st execute failed: called with 2 bind variables when 0 are ne
+eded at . . .
[download]

originating from this method:

sub _mark_as_called {
  my $self = shift;
  my $phone = shift;
  my $update = $self->{'cfg'}->param('sql.note_dial_result');
  print STDERR $update, "\n";
  my $sth = $self->{'dbh'}->prepare($update);
  $sth->execute($phone,$self->{'s'}->{'userid'});
  return;
}
[download]

What's up with that? Why would that update query not want two bind variables to execute?

-- Hugh

UPDATE:

Thanks Ikegami. I rewrote that query as: 'UPDATE asd_call_lists SET queued = TRUE WHERE phone = ? AND userid = ?;' and the error is no more. Those slashes were to escape the single quotes around t, inside the single quoted query. Not sure why the escapes were not appropriately processed. Thanks again.