I have an old DOS calendar program on a network drive. When I try to access it from a command prompt, I cannot change to that drive. If I run "net use", all my network resources show as unavailable. If I go to Windows Explorer and open the drives, "net use" then shows OK for all network resources. It is as if Windows did not fully connect the drives until I accessed them from Explorer. Other computers on the network do not have the same problem. The computer with the problem was recently reformatted and reloaded.