"Access Denied" error message Windows XP 64Bit

Updated from Windows XP 32bit to Windows Xp64 Bit.........Not able to accessible some of my Job Folder on my Slave 200 GB Sata ( 50GB x 4 Partition) only on the last partition (N:\ Drive) which contain images and Coreldraw Files.

There are 18 Folder and 7 Folder Not accessible. When I click the folder get error Message

N:\ Vignesh is not Accesible
Access is Denied.

I have logged on Administrator...

Thank You
Stalin

Thanks

This link helpme out.............
*www.thinkdigit.com/forum/showthread.php?t=70252