Grit

Something with your internet explorer settings is blocking the play button from working.. It's basically just a web page.

Normally I wouldn't recommend this, but you should manually edit your security settings (custom) and basically allow everything. Or do it one at a time to figure out which setting solves your problem. Also be sure to restart your computer at some point.

You might also try turning off your firewall and/or antivirus. Just for testing purposes.
I lowered my IE settings as low as they go, and allowed literally everything. I have restarted my computer to many times to remember, and disabled AVG, yet still nothing happens.

*Edit* And turned off my firewall.