I followed those instructions but I still get the exact same error. “your php version is too old, please upgrade to a new version. Your version is 4.4.9. Simple Tags requires 5.0.0”. It is at http://www.chelsealatest.co.uk/
The error occurs inconsistently. For example right now it works fine for me on my home PC in Firefox and IE, but it fails via my phone, and it fails when I go via a proxy server (pingdom.com). Very odd.