Im having a problem with my iptables module I believe.

I want to run the command:

iptables -t nat -A POSTROUTING -s internalIP -j SNAT --to-source externalIP
but it gives me the error

iptables v1.3.0: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

My control panel lists IPTables 1.3.0 as "Embedded in system" as opposed to "Installed" like most everything else. Is this something I need to change or is this unrelated to my problem? Also, FWIW, this is a VPS not a dedicated.

I appreciate the help.