CatTools is supplying command "enable" to enter into enable mode and the password you have entered will be supplied as enable password.
In case if you haven't configured password for privilege mode just enter the enable prompt under prompts tab of the device and try.
If you still have an issue just share me PuTTY log of manual session. Let ma have a look at it.
Thank you Rgnanda
I've fix the problem after I removed all usernames nad password including enable username and password as Riverbed only use SSH
i have riverbed model CX755 , how to configure it on KIWI cat for device backup configuration