I have some Express 500 switches that when I go into /exec mode and make a change to the port-security on one port and then the switch is powered off or loses power the change is gone. When I am done I do a copy run start and a wr mem. I looked to see if it is putting in the startup-config and it is in there. Any ideas of how can fix this? I have to make this change and I have had the same problem on a couple different ones.