Default CWM - impossible install it.

I had no problem to install the CWM on old virmware 4.2.2.

Now, after upgrade to KitKat the old instruction for install the recovery no longer work.
There is a new procedure to install the recovery?

Samsung S4 I9505 black

... ma ho sempre gli HTC nel cuore ...
... but I have always the HTC in my heart ...