Cannot be seen again!

hi guys..
please help me.
I have an external harddisk, the problem is I hide all my folders there using the properties of it,then at first I can view it if I will change the settings in folder option of control panel. But now I can't view it anymore even if change the setting in folder option in the control panel still I can't view my folders in my external hardisk..pls help me how to restore it. all my back_up files is there.
pls,pls,pls i really need help..
GodBless!

View all files and folders
And
View system files

2 areas in there to adjust

Then close the hard drive folder and re-open the hard drive folder (ie refresh)

To Kimsland:
Where can I view all files and folders? And the View system files also?

Control Panel -> Folder Options -> View tab

Show hidden files and folders (selected)
Hide Protective operating system files (untick)

Or

Download this http://www.herbystweaks.net/files/SysFilesCMI.zip
Read the text and use, it's quicker
A nifty little program
You must refresh the folder too "View - Refresh"