Vista's 'D' drive locked.. help...!

I'v downloaded 'Easy Drive Lock v4.2' from an well known website.
That was a zip file. I extracted it.
There were two files, EasyDriveLock.exe & Unlock.exe.
I opend EasyDriveLock.exe and set a password.
Then I lock my 'D' drive.
So its name in 'My Computer' become as 'Access Denied D'.
I tried to open it, then a dialog box appear, saying :
"D:\ is not accessible. Access is denied."
Then I opend Unlock.exe, select drive 'D', gave the password & clicked on 'Unlock' tab.
Again a dialog box appear, saying :
"UnLock Successed..!"
But in real, nothing happened..!!!
I tried it again by using 'EasyDriveLock.exe
But the problem is still remain.
My OS is Vista Home Premium 32bit.
Please Please Please Help Me to get out of this, because my all important data is on drive 'D'.
Thanks in advance..

The best way is to go back to the sites "EasyDriveLock.exe & Unlock.exe"

and get helps from them .....i believe they can unlock it for you ...