Data Recovery Access

How can i recover deleted files on a physical drive using get data back on windows 7?
I have installed Runtime Get Data Back on Windows 7 and i keep getting the error:
“You must have administrator rights in order to access physical or logical drives!”
Somebody familiar with this? I gave my account full access, i restarted RGDB, but still got the message. And i need to perform a data recovery from deleted files.
I found the answer myself:
Right- click on the programicon, and select
“Run as administrator”.
It works like a charm
you need rely on professional file recovery tool to get them back. A popular one is Asoftech Recovery. This tool can deep scan your the computer and recover your lost files back without requiring extra skills. Here is the steps might be helpful to you:
1. Download this program on your compute. here is the link: http://www.asoftech.com/apr/
2. Install and start the program. then click on settings on top right part of the program, check all items and click OK.
3. select the drive where your lost files located, click Start. Now the scanning process will start to search the deleted files. After a while you will then get a list of recoverable files.
4. Press Recover to perform full recovery.
Hard Drive Data Recovery With Vantec USB SATA IDE Hard Drive Adapter