We have shared several folders on the PDC and have mapped them to various drive letters in the login script. When the user logs on the drives are mapped and work fine. After about an hour the drives becomes inaccessible and supply’s an “AccessDenied” mes sage through explorer. A net use command reveals all the mapped drives are disconnected. If the user then connects to the share through Network Neighborhood, the drive is reconnected and again accessible through explorer. We a running NT4.0 service pack 5 .