We are running server NT4 sp6 and we have a program that runs from the server. The problem is that at different times/days/weeks some of the workstations cannot connect to the server for this program. If you do a find for the server it does not find it but you can ping it from the command prompt and get a response. This does not always affect all users and does not seem to follow any pattern as far as time. If we reboot the server the problem usually goes away and everyone can connect again until the next time it happens. If the computer is already connected and has the program open they are able to stay connected but the computers around them can not connect during this time if they are not already connected to the program. The workstations can still access other servers, printers and internet. The workstations are running Windows XP and Windows 98se. This is happening on two different servers in different buildings. We have 6 servers running this program and only 2 of the servers have this problem. I can not find anything different between the servers or program. All of The servers are even identical down to the hardware. The program is installed independently on all servers so they do not connect to each other to run this program. I ran netstat and everything looks ok and I don’t see anything in the event logs. Any and all suggestions are greatly appreciated before I go totally gray over this.