How have you pointed the domain to x10hosting?
If you pointed it by nameservers, you should point it to ns1.x10hosting.com & ns2.x10hosting.com . If you're doing it by A records, you should point them to: 67.228.162.200
PM me your hosting account password (you can change it to a temporal one) and I'll do it for you.
Fantastico doesn't allow this to be done as root (you need to login as the user), if not I would have already done it.
Go to: http://x10hosting.com/account, login with your FORUM username & password, and request the "Intermediate" PHP Version. This will enable on your account some functions that are disabled on the Basic PHP version.