Issue solved !

I tried giving the sql server 2000 port number i.e,1433 nd it got connected.

The whole server name will look like this

[server name]\[Instance],1433

Was plannin for another installation actually. Thanks guys for...

It's already registered in the server(named instance). No other client machines are able to connect to it through the network.

Is this issue because of the coexistance of both sql server 2000...

Tried it !

It's listening over TCP/IP

Thanx for the support