I have been fighting this same problem for weeks without luck, but I finally stumbled across a solution which may be of value to someone. I have an older 2wire wireless modem which uses WEP for security. The password for the modem is a 10 digit number, but the camera would only accept 13 digits for 128 encryption, and 5 digits for 64. I played with combinations since I had run out of ideas. I found that selecting 64 bit HEX for the key did the trick. It accepted my 10 digit key, and the camera connected wireless. Good luck.