PHP Last.fm API

As mentioned here
http://sourceforge.net/apps/mediawiki/phplastfmapi/index.php?title=FAQ

1. I run examples/auth/index.php
2. I end up on a Last fm page -

http://www.last.fm/api/auth?api_key=

which says 'Invalid API key. If you are a third party developer see our authentication how-to to find out more.'

I've tried replacing the 'apiKey' and 'secret' in examples/auth/index.php
but still the same problem..

Help! I'm keen to use this great resource you've made the effort to make but going a bit nuts right now..

Am I missing something ? :(