I just got one recently as well. Don't worry about the traps, they'll open up when it's happy.
Just be sure of the following: Water with
only distilled water (not tap water, not bottled water even, which contains minerals). I made this mistake (using bottled spring water) for a few weeks and it doesn't look too happy. Also, don't water from the top -- put the pot in a dish and water from the bottom (let it sit in the water all the time). And don't ever fertilize.
That said, I've had mine a few weeks and it's growing like crazy -- but the lower leaves/traps just turn black, and pretty quickly. I'm not sure how normal that is for traps to die off so quickly. The poor bugger hasn't eaten yet, either. Alas, not too many flies around here yet.