Download large joomla 3.2 file


I have a website using J3.2.3 with e-commerce extension Hikashop 2.3

Hikashop allows an export for Google products, however when I try to download this file, I get an Internal Server Error 500. Hikashop says it is due to file size.

I have fastcgi php 5.3 with a current phprc file of:

memory_limit = 500M

post_max_size = 100M

upload_max_filesize = 100M

max_execution_time = 0

max_execution = 0

Can anyone offer any suggestions…?

Thank you