I have a server that is running MS SQL 2000 and MS SQL 2005. The 2000 server has been there a long time and has multiple applications talking to it over the default 1433 port. The SQL 2005 install is using an instance <servname\instancename> which by default uses dynamic ports. I have forced the instance to use port 2433 instead of the dynamic - however i cannot telnet to this instance using port 2433. There is no firewall in place and just to test i also set everything back to dynamic - restarted SQL Server 2005 and tried to telnet using the dynamic port that it acquires - still no telnet. I had read that SQL 2000 and 2005 could live together in harmony on the same box. Is this not the case????