How to configure port-security on Cisco Switch

Hi Rene, I have a strange problem related to your post. We have a unmananged switch connected to a managed switch port. That port is configured as follows:

 description Conference Room
 switchport access vlan 43
 switchport mode access
 switchport port-security maximum 16
 switchport port-security
 authentication host-mode multi-host
 authentication port-control auto
 dot1x pae authenticator
 dot1x timeout quiet-period 20
 dot1x timeout tx-period 10
 spanning-tree bpduguard enable

If a user connects to this switch and then unplugs (not Logoff), goes to their desk and plugs in, their port is Err-disabled. I have to shut the port on the conference room and then shut and no shut their port. After that all is well. What can I do to prevent me having to shut the port the conference room unmanaged switch is in?

Thank you,

Kevin Martin