Open Attachments logged off of system

Hello,
Hey, I need help.
since the last couple of weeks, every time I open an attachement, the system logged me off, so after reviewing the attachment, I need to log in again.
this happen everytime, please help me explaining how I can overcome this situation.

I want to go back at the time when I could open all the e mail attachements from every message with them. One by one from the same logged in that I was.

I do not if I moved something or change something that is causing me to have this problem.


Thanks for your help

Mario