I want to change zhe display name of some devices in the DCR. But I always get the error message :"The device is not available in the Device Credential Repository, or you are not authorized to view the device details."What's the problem?

Hello,I tried to uninstall CW LMS 3.2 but after I got this message:Windows Management Instrumentation (WMI) is running. This locks processes and impedes installation. To avoid WMI conflicts, this Setup program will stop and immediately restart the WM...

When I change in the DCR the device credentials for the telnet/ssh access and klich finish I get this Error Message: Internal error in communication channel.What can I dou against this?