Check Point: SSH Idle Timeout

In FTP'ing a large file into a management station, I ran into getting logged out a few times.  I realized I had to set the time value to something higher.  So I did just that.  Oh yeah, it doesnt appear that you can do this in expert mode either:
I get logged out:
[CP]#

Idle timeout expired, performing auto-logout...

Then I SSH back in:
[CP]# expert
Enter expert password:

You are in expert mode now.

[Expert@CP]# idle 999
bash: idle: command not found
[Expert@CP]# exit
exit
[CP]# idle 999
[CP]#