Missing Icons after Upgrade

Hello Everyone,

Over the past couple of days I have been upgrading our site from Drupal 5 to 6. So far everything is going well and at first glance, WebFM appeared to be working fine. However, I noticed last night that all of my icons are missing in my browser view (icons for directories, add to database, etc.). Any thoughts on how I managed to do this one? I apologize if I this is covered in another post, but I didn't see it anywhere.

Many thanks in advance,
Rob