I have two PIX 501s and they were connected via a vpn. All of a sudden the circuit dropped and after rebooting both devices, I ahve not been able to reestablish the VPN. I changed the PRE-SHARE key on both and changed the transform sets, but no change. Once someone gave me a command to reset the crypto key. I am not sure if this is what I need to do. Does anyone know the process to do that or can you offer some troubleshooting advice?