Windows 2000 Mapping

Hi Friends,

We have windows NT(Domain) & have windows 2000 pro. as a client. I have config. the windows 2000 to login to Domain. & had mapped come folder to the drive. now the problem is that when user login in he don’t get connection to the map(it shows RED cross although he is login to the domian & there is not connection problem). Then i have to restart the machine then when he login he is able to connect map drive. I am not able to figure out the problem. Can any one help me out with this problem. Thanks in advance. Awaiting for your reply.