Accessing areas in Lego Star Wars on PSP??

I have been playing Lego Star Wars on PSP and was wondering if someone could answer this? Near the very beginning, you go down the first white corridor and reach a room where there are two grappling pads where you then have to build the expandable bridge. In this room, you can see that there is a level below containing lots of studs and a mini kit canister. How do I get access to this area? I've tried everything I can think of and I don't think smashing my PSP against the wall will do it but that's going to be my next option if I don't find out. Thanks