Auxiliary Box Won't Open

I own a 2005 Prius. The auxiliary box that is located on the instrument panel below the audio system will not open. Normally, you push the door and it pops open. Last week, it got stuck on one side, but I was able to get it open. Now it won't open at all. The jack to connect my iPod to the DICE unit is inside this box.

I hate to think how much it's going to cost to get the dealer to fix this! I'm hoping someone has had this problem and might be able to help me out.