Remove Option 150

Hi all,

I have recently added Option 150 to a DHCP scope on an EF-100 running v6.0.5. I now realize that it is not required and would like to delete it. When I remove the line from the Advanced DHCP options and the click 'OK', the window disappears. However, when I check again, the option is still there.

Any ideas gratefully received!

Thanks,

Andy