Windows 2000 and XP use oportunistic locking. Maybe this is the issue. Try to disable oportunistic locking by editing registry on server:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters]
Try to change "EnableOplocks" value to 0.

>Sometimes happens that i cannot access a vfp table because it seems to be in use by someone else.
>It is also impossible to rename it from windows.
>I'm 100% sure it is not used and all the vfp applications are closed.
>Is there anything i can do to get rid of this problem ?
>Thank you
>Alessio