Situation: two machines. Same versions of DBI and DBD::mysql.
Running the following sub:

use DBI;


my $dbh;

open_db_conn();

my @active_homes = get_active_homes();

$dbh->disconnect();

sub open_db_conn {
  my $dbd      = "mysql";
  my $host     = "host_name";
  my $db_name  = "db_name";
  my $user     = "login";
  my $password = "pass";
  my $dsn      = "DBI:$dbd:$db_name:$host";

  eval { $dbh =  DBI->connect( $dsn, $user, $password,
                       { RaiseError => 1, AutoCommit => 0 } ); };
print "Could not open database connection: $@"  if $@;
} # &open_db_conn


# Get active homes.
#
sub get_active_homes {

  my $sth = $dbh->prepare( qq{ call myProc() } );
        $sth->execute();

  print "Trouble with database connection: $@"  if $@;

} # &get_active_homes
[download]

Code runs fine on machine #1.
Running on machine #2 returns the following:
DBD::mysql::st execute failed: PROCEDURE db_name.myProc can't return a result set in the given context at ./test0.pl line 32.
DBD::mysql::st execute failed: PROCEDURE db_name.myProc can't return a result set in the given context at ./test0.pl line 32.


Both systems report the following from CPAN:

cpan[1]> i DBD::mysql
CPAN: Storable loaded ok
Going to read /u/user/.cpan/Metadata
  Database was generated on Wed, 13 Jun 2007 03:07:59 GMT
Strange distribution name [DBD::mysql]
Bundle    Bundle::DBD::mysql     (CAPTTOFU/DBD-mysql-4.005.tar.gz)
Module    DBD::mysql             (CAPTTOFU/DBD-mysql-4.005.tar.gz)
2 items found

cpan[2]> i DBI
Strange distribution name [DBI]
Bundle    Bundle::DBI            (TIMB/DBI-1.56.tar.gz)
Module    DBI                    (TIMB/DBI-1.56.tar.gz)
2 items found
[download]

What other modules do I need to synch?
What other step(s) did I miss?