Outlook 2007 backup

I want to transfer the contents from my old sysstem to new. In my old system the path is D:\Users\Santhosh\AppData\Local\Microsoft\Outlook\Outlook.pst but when i try to copy .reg files and try to install it in new system it shows the above mentioned path is not valid. because this path is not there in my new system. How can i change the path in my old system or how to back up and restore to new sysytem.

Santhosh