When a site from Ensim Pro for Linux v4.x and below or Ensim Pro X for Linux (FC2/RHEL4/CentOS 4.x) is imported to a Ensim Pro X for Linux (Fedora Core 4) with high security level, all PHP pages errors out with 500 Internal Server error.
Primary reason found is difference found is in PHP versions (Source : PHP4 and Target : PHP5)
To fix the above problem for existing imported sites, To fix this problem download the script and execute on the server.
md5sum : 28248ef7b083046a980a1bfc3c641b8c
# wget http://download.swsoft.com/ensim/download/pro/linux/kb/2358/fix_php_KB2358.sh
# sh fix_php_KB2358.sh