the installer will not start , I am trying to install version 1.3.0.1 , I am getting:

Error 500: Script Execution Failure
Premature end of script headers: index.php | directory is writable by others /home/www/public_html/zen_cart/

1. files are uploaded to "public_html/zen_cart/" folder
2. Permissions all set properly as instructed.
3. the 2 configuration files are edited very carefully.

no luck!!

any Idea how to solve this probelm?

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Yabora