Hi,
Can you please re-download HikaShop 2.4.0 (and not 4.2.0) and tell us if the latest built of the package still give you the issue ?
You will find some thread talking about shipping issues in HikaShop 2.4.0 and we put online a package with the latest fixes (before release HikaShop 2.4.1).
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.