How do you get past the Geyser rock in Sims 2 Castaway Wii?

First, you must buy the most expensive bed. Then, eat something that is high in energy. Then, go to the rock. Click on the rock and select "inspect". If you don't want to buy the bed or eat the food, then enter the cheat -+zza. That will fill your energy. You will need 8+ body skill. If you don't have this much, then build body skill until you do.