Hi,
I ran into this problem today.
I do all of my configuration from the command prompt and my standard operating procedure is to disable everything but ssh access. One of my clients uses the CP product and had this issue.
Turns out, it's because I disallowed telnet access. I permitted telnet to the local network and it worked just fine.
line vty 0 4
transport input ssh
line vty 5 9
transport input ssh
line vty 10 15
access-class 69 in
transport input telnet
Standard IP access list 69
10 permit 192.168.1.0, wildcard bits 0.0.0.255
Not sure if this is your issue, but it worked for me. Good luck!