Command not found in service console ESX 4.0 u2

Hi all,

I have a very simple question.

I haven´t accessed the service console of ESX 4.0 for a little while and today I needed to run some commands to verify information about some HBAs.

I logged in as a user then used "su root" to change to the ROOT user.

I am using Putty to connect to the Service Console.

But when I try to run the following commands it says "Command Not Found":

vmkload_mod

esxcfg-module

I have read VMware KBs that say to use these commands for this version of ESX but I can´t get it to run.

I think the answer is something very simple but I can´t find it.

Anyone have any ideas?

Thanks

Mark