TimThumb is not working, a 403 error is displayed

Hey guys, i have a beautiful blog here :- https://www.techhacker.org Its a theme brought from themeforest, theme name is Twicet.
the author is not replying to my questions, so i have got no support for the theme i purchased ??
But if you see below the glider, 3 small boxes would appear. they are the places defined for thumbnails created with timthumb. for some reasons, they dont work. heres what comes when i access the link directly :-

https://www.techhacker.org/wp-content/themes/twicet/timthumb.php?src=https://techhacker.org/wp-content/uploads/2009/08/crush.jpg&w=44&h=30&zc=1&q=100”>https://techhacker.org/wp-content/uploads/2009/08/crush.jpg&w=44&h=30&zc=1&q=100”>https://www.techhacker.org/wp-content/themes/twicet/timthumb.php?src=https://techhacker.org/wp-content/uploads/2009/08/crush.jpg&w=44&h=30&zc=1&q=100

i dont know what is the problem coming.

my cache folder is set to 755 script containing folder is set to 755 timthumb is set to 755

the cache and timthumb script are in the root of the theme folder

but i cant get it to show thumbnails. Can anyone help me ?