When you say you can't see the photo, does it mean that you only syy something like "photo123.jpg" while you want to see the miniature of the photo, or you don't even see the name of the photo?
In the first case:
Open the parrent folder.
Right click and sellect "Properties..."
On the last tab, you can sellect the display mode. Make sure it's set to "Images".
You should have a check box just under it that say "Also apply to sub-folders".
Make sure that it's checked. If checked, uncheck and re-check it.
Click "Apply". You may need to wayt a little for the changes to get propagated to every sub-folders.
Now, every sub-folders under the current one should be displayed the same way.
Electro, January 2013