Connect to Database using isql is failing with the following Errors:-
isql -d [<db name>] -U sa -P sa -n -i
DB-Library: Unable to connect: SQL Server is unavailable or does not exist. Unable to connect: SQL Server does not exist or network access denied.
Net-Library error 53: ConnectionOpen (Connect()).
Connection to Same Database VIA SQL Analyzer is succeeding
NOTE - MS SQL 2K Server "Enterprise Edition" is installed in a Cluster Environment of 2 Nodes each having Win2k Advanced Server