You need to talk to the simpletech techs.
Check
http://www.simpletech.com/support/su...impleshare.php.
From what you have posted, it does not seem that the filesharing functionality is enabled.
Did you use the NASFinder?
Call them or take snapshots on the interface and post the URL here where those images can be seen.
It's possible that there is something wrong and the box does not completely boot.