#2 mb_ereg_replace()

[Amirul Momenin]

I am using Mysql-5.1.37&PHP Version 5.3.0
But the warning message is displaying when i try with with a word into inputbox (English to Whatever)
Warning: mb_ereg_replace() [function.mb-ereg-replace]: mbregex compile err: empty char-class in E:\xampp\htdocs\ote\class\ote.util.php on line 222