delete network files

after creating a file on a network server for temporary
use, I try to delete this file and get "error deleting
files may be in use by anothe user" Rights and permission
on server are same as when I ran windows 98 with no
problems. When checking open file on the server the file
is open as if still in use. Is there a delay time for
response from a network connection. Very annoying when
working with small files that are open an closing quickly