File attributes blocked by windows

Hi, something happened in my NSLU2 and few (few thousands :( ) of my multimedia files  has file attribute like picture "SA" and this files are not listed in windows media player, rest with "A" are OK.  This attributes is looked only in Windows, checked of course chmod and other command and nothing... Anybody knows what is this SA and A attributes? Can I change it? I'm seeking third day and nothing....