Likely not a PIP issue.
what browser? IE? FF?
Something is block Image server to your location.
FF can block images from a server.
Any router can block server or service.
Can you Ping images.fieroforum.com?
If not could be local DNS problems or other reasons.
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)