[eluser]01010011[/eluser]
[quote author="Jelmer" date="1271787709"]Only thing I can think of is that you're possibly using PHP4 that doesn't recognize __construct() as the autoloader and as such the helpers weren't loaded.[/quote]
Thanks for your reply Jelmer, it helped me figure out a solution around this problem.
I'm using XAMPP version 1.7.3 which has PHP 5.3.1.
It worked when I used "Classname()" instead of "_construct()". Why does it not work with _construct()? Anyway its working now. Thanks.