Delete or move a file on a shared drive!

Hi Experts,
I’m using a Windows 2003 server and I can’t delete or move a file on a shared drive.
The server won’t allow, when I tried to delete or move a file, it prompts that the program is being used but actually it’s not.
I didn’t encounter this problem with my previous server.
Can you help me on how to solve this issue?
Thanks in advance.
