$DBI::errstr never holds any value

Behold the following code snippet:

        $dbh = DBI->connect("dbi:Sybase:server=$server", $login,
$srvpassword,
                            {PrintError => 0});
        if (! $dbh) {
            print "Can't connect to $server: $DBI::errstr\n";
            $error = 1;
            next server;
        }

I never get a value from $DBI::errstr (in the case that I'm trying, the
reason is a wrong password). What am I doing wrong?

Thanks,

Steve