What should I do if I haven't gotten a follow up?

I applied for a job at a museum, my first job, hopefully, and have yet to hear back from them. Usually, I've gotten a response email telling me to try somewhere else within about 3 weeks. But for this place it's been a month. I actually forgot about it for a while. Do you know what I should do about it? If anything? It's a job I really really want, and I think I'd be pretty good at it. It's the first job I've ever seen that I've ever even remotely wanted. And I'm desperate for it. What should I do?

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