Mount ext3/ext4 in Windows guest with Ubuntu as main system

Hi,

I have just installed Ubuntu as main system and Windows 7 as host (on Virtual Box). I would like to mount ext3/ext4 disc in Windows guest system. I have installed Ext2Fsd on Windows (it launched Ext2 Volume Manager) as it says it is "Open source ext3/4 file system driver for Windows (2K/XP/VISTA/WIN7)". I have mounted my drive in Windows through Virtual Box settings Devices -> Shared Folders Settings. Unfortunately, it does appear neither in My Computer nor in Ext2Fsd application. What should I do to enable this share?

Thanks in advance for help :-)