How do I find out my wep key

Question

My hard drive died and I do not know my wep key. All of my passwords were on the dead hard drive.One other computer in the house is on the wireless network with the wep key but mine is not. How do I get the wep key for my computer? Do I have to do something special since I have a new hard drive. My computer can pick up other connections but my wireless connection called "animator" I cannot access.
Thanks for helping.