The problem is:
1. Still using old version of 6.5.1.b (2014031201) --> updated to 2014040405
2. Using mysql 5.1 after reinstall --> replace to 5.5 with 'yum replace'
3. Reinstall missing qmail-toaster components manually
3. Re-upgrade php53s --> run 'sh /script/php53s-installer'
4. Run 'cleanup'
5. Go to panel and then re-setting web/dns/spam/php-type
6. Finish.