I had sql server 2000 client installed. At the same time had sql server 2005 express installed on the same machine. It was workin well nd fine.Later I upgraded the client version of 2000 to server (as named instance).
I can connect to both my instances locally but am not able to connect to the 2000 named instance through the network.
Tried many things like changing the settings, installing sp3 and all but in vain.