I upgraded pix 525 IOS ver 5.2(3) to IOS 6.0(1).The DES feature was disabled on the PIX.The show version commands shows the activation key to be activated to enable the DES.During upgrade of the IOS I was not prompted to enter the key.Now i have IOS 6.0(1) in the PIX525 but DES is disabled.I tried to enter the key manually but i could not succeed.
Kindly help me out and reply soon.