If you have iTunes, clicking here should open the podcast page in iTunes, from where you can easily subscribe. If you don't have iTunes (or wish to manually subscribe), you should copy this manual link, and enter it into an "Advanced Subscription" field.
Below is a walkthrough on how to subscribe with iTunes. Clicking on all of the images will enlarge them.

Link Subscription:

Step 1: Click on the link


Step 2: Click "subscribe"


Step 3: The podcast should now be under "podcasts"

Manual Subscription:

Step 1: Click on "subscribe to podcast"


Step 2: Enter the podcast url


Step 3: The podcast should now be under "podcasts"


If you're still having trouble subscribing, please contact me.