OK, here is an update to my problem. Nothing is broken :-)
Here is the condition,,,
1. My explorer was "pinned" to my taskbar
2. I closed explorer by clicking x in upper right corner.
3. Samba times out unused connection and I get red x when I reopen exploer.
4. Older version of FreeNAS and LINKSYS NAS not timing out.
5. When I upgraded FreeNAs I got the same condition as Linkstation !!!!
6 Also noticed if I simply minmized explorer it would nut time out.
7. If I put a shortcut for explorer on desktop you dont notice that they have timed out
So, needless to say, it was a question of understanding how newer os works and how newer samba must work.
Thanks