Moving RHEL4 to VM and confusing redhat-support-check message

[sub at nryc.fr]

Hello,

I moved a RHEL4u8 system from a physical Dell PowerEdge M600 server to a 
VMware virtual machine.

At bootup I have this warning and I don't know how to interpret it :

"redhat-support-check: WARNING: Red Hat Enterprise Linux ES release 4 
(Nahant Update 8) requires no more than 2 CPUs to run as a supported 
configuration. (8 detected)"

The virtual machine can see the 8 CPU and this warning is not shown on 
my others RHEL4u8 systems (hosted on physical server).

Is it something I should worry about? If not, why do I have this message 
only on this server?

Maybe it's a recent update of redhat-support-check? I haven't rebooted 
my other servers in a while, maybe this message will popup too when I will?

Regards,

Nicolas