I successfully connect to MS-SQL 2000 from a Solaris box. Here is a list of what I used and in the order in which I compiled and installed the packages:

• freetds-0.61
• DBD-Sybase-0.91

# Here's my connection string

my $dbh = DBI->connect("dbi:Sybase:server=DDSql;database=toto", 'sa', 
+'pass', { RaiseError => 1, AutoCommit => 0 });
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where DDSql is a DNS established in the freetds.conf file. It looks something like:

[DDSql]
        host = 10.10.1.44
        port = 1433
        tds version = 8.0
        emulate little endian = yes
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