I just installed OpUtils 6 to evaluate IPAM. First thing that I tried to do was adding a router. The router is a Cisco 3725 multi layer switch with "ip routing" enabled. In OpUtils I filled in the IP address of the router, SNMP read community, vendor name, user name, password and password prompt. After a while, I got a message "login failed: Password or Prompt are incorrect.
When I use Wireshark, I can follow the Telnet conversation and I see the exchange of the userid, the password, followed by the enable-prompt of my Cisco 3725, so I definately see that the logon succeeded. Strange enough, but after about 10 seconds, OpUtils retries to connect again and there is also a third attempt.