can't change the SSH Server in firewall properties

Hello all,

I met a strange issue.  my esxi host version is "5.1.0, 1157734". I found that I can't change the configure SSH Server in the firewall in the "security profile".

- I checked the "SSH Server", then I can click "OK"

- When I tried to uncheck "SSH Server", I can't click "OK" , it poped up a error window "cannot change the host configruation"

I found a kb http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2037544, but I didn't think the kb applies to my issue.

I tried to fix the issue using VI to set the sshserver=false in  \etc\vmware\esx.confg, restarted the esxi host,  and found the "SSH Server " is unchecked in "Firewall properties" under "security profile", After checked it again, I found I can never uncheck it again...

is it a bug in esxi 5.1.0, 1157734 ?