Hi,
The errors are not linked to Fedex, it's link to the cron task which update the currencies (using a soap webservice).
The SoapFault indicates that the service is unavailable so, it could be possible that the service is not available but it is possible too that your server have a firewall which disallow outgoing HTTP.
But I didn't see any fedex error in your log.
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.