Oh didn't realize that DBIx is direct subclass, so I can use all the methods of DBI. Anyway I changed the script accordingly (using just one $dbh DBIx Threaded object), and instead of the async methods I use regular ones, but now the problem is that script isn't able make use of more then one connection, so after one thread is created and detached, the second throws fatal error, as it is unable 'prepare' the statement and return $sth object...

my $dbh = DBIx::Threaded->connect("DBI:mysql:database=$database;host=$
+host", $user, $password);
DBIx::Threaded->dbix_threaded_create_pool(10);

my $sth = $dbh->prepare("SELECT id,domain,DATE(created) FROM domain_li
+st");
$sth->execute();

my $counter = 0;
 
while (my @row = $sth->fetchrow_array())
{
    my $id = $row[0];
    my $domain = $row[1];
    my $created = $row[2];
    next unless $row[0..3];
    my $thr = threads->create(mx_lookup,$id,$domain,$created,$dbh) unl
+ess $counter >= $thread_no;
    $thr->detach && $counter++ if $thr;
}
$sth->finish();

sub mx_lookup {
    my $id = shift;
    my $domain = shift;
    my $date_c = shift;
    
    my @date_c = split /-/, $date_c;
    my $delta = Delta_Days(@date_c,@date);
    my %emails_in;
    my %emails_out;
    
    if ($delta <= 30)
    {
        my @mx = mx($domain);
        #add multiple mxs support here
        my $mx_count = @mx;
         my $mx = $mx[0]->exchange;
        
        #find the last change for the given domain
        my $sth = $dbh->prepare("select max(id),domain_id,changed_from
+,changed_to,date from mx_history where domain_id=?"); #this is where 
+the script fails
        $sth->execute($id);
        
        my @row = $sth->fetchrow_array();
        $sth->finish();
    }
}
[download]

And $dbh->errstr is -->

Thread 43 terminated abnormally: Error:Unexpected db_prepare request: 
+must be connected to do that.
[download]

seems like that the $dbh handle isn't conected at all...