What's the name of the 'Future of Classic' song from late 2008 to early 2009?

It's basically the last song that they've played with the commercial. It's not 'Time is the Enemy'. It's a new song. There are no words in the song and it's basically just a guitar and a drum. This song has been in me head for weeks and i can't find out what it's called. Please help me =(.