Error adding device to VM

I am running Proxmox 3-2-1. I have a Windows 2008R2 VM running. When I go to add a DVD Drive I get this error "checksum mismatch (file change by user?) (500)" and it fails. It does not make any difference which media I select.

This machine will also not restart from windows. I get the BSD. It does work if I shut it down and start it again.

Thank you in advance for your help!

Kevin