Error on edit Document, DB down,no error log

Hi,sorry for my bad english,

I have a problem with notes,

from 3 days, in a notes db, when i attemp to edit a document by double-clicking in a view, the database goes down (closed), and show its first page.

I don’t have any error windows or log error.

If I login as administrator,on the server, this does not happen

thanks to all,

Edoardo