"Invalid session token. Authentication failure" when Remote KVM & CD on Intel Modular Server?

I encounter error (alert window  "Invalid session token. Authentication failure") when doing Remote KVM  & CD on Intel Modular Server MFSYS35 (see attachment).

I have  restarted the CMM by click SAVE button on the IP Configuration menu  (without change anything) and the CMM restarted but the problem still.

The alert window disappear after restart all the chassis.

Is there any other way to get rid of alert window "Invalid session token. Authentication failure" without restart the chassis?

Firmware : 6.6.100.20101015.23953

best regards

Thony