Windows 7 - I cannot view the XP files "Desktop" "My documents"

Hi From Turkey

I have a problem.
I bought a new computer with windows seven Pro
Here is a company and we have a domain controller.
So my old computer (With windows XP Pro) was in domain.
I joined in my new computer to domain.
I removed the Harddisk of my old computer. and then i put it into my new computer case. second drive.
I restarted the computer. When i look the Second drive i can see "Document and Setting" directory. iam logging in to "Desktop" directory to copy my old files to my new desktop. but it was EMPTY.

When i remove the harddrive and put it into my old computer i can see all the files.
Has anybody have any idea?

P.S. Sorry for my bad English.

Set the Win 7 PC to show ALL Files and Show Hidden and System files.

When that old hard drive is in the new computer Take Ownership of that folder. Set permissions to allow Full Control of that folder for your username.