Photoshop Elements :: Imported Pictures Are Not Showed In Current Path

i am using elements organizer 10 to organize my pictures, about 100.000.
 
All these pictures are in the location D:/pictures/privat pictures/2001/YYYYMMDD. Each year has a lot of folders oriented by date.
 
All this pictures are a second time at my backup drive Z:/backup pictures/private pictures/2001/................
 
After creating a new catalog and start importing all files from D: it takes time till all pictures are imported.
 
But then the failure happens if i click to any folder in D: i can not see any picture.
 
If i start import i.e. for one single folder again i get the message" pictures are already imported..."
 
If i click at  a bar in the timeline the pictures are shown and the path tree shows it at location Z....with the path name from D:
 
I created more catalogs the last time to find a solution.
 
I use Windows 7 ultimate