How to enable TLS 1.1 and 1.2

The  box    Windows Server 2008 SP2 64 bit      Exchange Server 2007 SP1

I'm trying to enable TLS 1.1 and 1.2 on my Exchange server as well as the ciphers, but I have been unable to do so yet.   I have followed an example I saw and it didn't work

http://www.derekseaman.com/2010/06/enable-tls-12-aes-256-and-sha-256-in.html 

When I connect to my Exchange OWA page, its using TLS 1.0 and TLS_RSA_WITH_AES_256_CBC_SHA.  If I run a tester it shows that my server only supports TLS 1.0 and no other protocols.  I'm not sure where I'm going wrong on this. 

Thanks,

David