entitlement Certificate when I rebuild?

Hi, I'm new to Linux and built a server to study for my RHCSA and RHCE. The server I built did not have vitualization hardware technology. I had already registered this server and installed my entitlement certificate when I discovered this.

I simply trashed the instalation and went out and bought a machine with the correct hardware. Now I have re-installed RHEL 6 on this new machine I do not have access to a new certificate.

Can anybody advise the best course of actiuon open to me mow?

I only have the 30 day trial subscription by the way.

Regards

Andy B