The problem is that you’ve used the same WEP key for too long. If a snooper monitors your network (packets, each with the same WEP key) for long enough, he will be able to crack the encryption. However, if you regularly change your key, it will be much harder to crack the encryption. You should change your encryption key regularly, i.i. every week or so. To setup a new key, See How to Encrypt Your Wireless Network
Changing your key regularly can be a pain, but there’s a utility that can life a bit easider for you. The WEP Generator utility will automatically generate a WEP Key for you which you can print or write on a paper. You can then take that printout from PC to PC and type in the WEp Key. The program is free from Chris Elliott / Warewolf Labs WEP Key Generator.
