Default "Prevent copying" Delivery Option

After installation of new 8.5 beta2 client on Windows Vista I have one of Delivery Options “Prevent copying” checked by default. So I need to uncheck this option every time I create new message.How to change this default setting?

I use my old mailbox with 6.5 design on the same Domino 6.5 server. If I open it with 6.5 client on another computer this option is unchecked by default. I think it means this setting is somewhere inside client configuration.

Dear colleagues, please advise …

Subject: Could you please provide a ‘design only’ copy of your db and we’ll investigate.

Default Prevent Copying shouldn’t be set by default.

Thanks in advance.

Subject: Attached database design file

Sorry, I had to leave my job unexpectedly for a month. Now I am back and ready. The problem still persists, thank you for feedback and efforts. See attached file with copy of database design.