DLNA in Windows 7 64 bit - newly added files not available on devices.

dear Readers,

my apologies if this is the wrong forum.  i have a windows 64 bit machine.  using resources on the internet, i was able to configure the media files (music, photos, and videos) on different folders to be playable on my personal DLNA compatible new BD -570 SONY player and Samsung 40" LCD TV.

2 weeks ago, i created a folder under that shared subdirectory and added a few more mp3 files.  the folder and those media files are not visible downstairs on my TV or my bluray player.

is there an extra step i need to do before having the newly created subfolder available downstairs.

thanks for your help.

regards

Ravi.