How do I actualize the visible files in File Explorer on Windows browsing SDCard of Sony Xperia Ray?

If I browse my SDcard on Windows 7 I can see only the folders that where there the first time I connected the phone via USB.

When I create a new folder on the device later, It is not visible in the Windows Explorer.

these are the steps to reproduce:

1. connect the phone via usb to Windows


2. open the sdcard in windows explorer


3. use ES File Explorer to create a new folder on the sdcard

now the new folder is not visible in Windows. Even a refresh with F5 doesent make it visible in Windows.

How can I solve this problem?