Hi,
I have re-generate new HikaShop packages and I have test them in my local website.
Please redownload HikaShop 2.6.4.
If the problem persist, it should be related to other web-server parameter and I'll recommend you to try the install by folder (extracting the files from the zip into a tmp folder).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.