Java Database Connectivity (JDBC)

Problem: i have MSSQL 2000 on machine and JBDC work on another machine, i use the SQL to authenticate users form DB, but the connection between the JBDC and SQL always didn't go up.

the configuration on the program that using JDBC like that:

Driver=com/microsoft/jdbc/sqlserver/SQLServerDriver

Connect=DSN=jdbc:microsoft:sqlserver://x.x.x.x:1433;UID=sa;PWD=test

but after restart the program, show this error:

java.sql.DriverManager.getConnection threw an exception.

but by using the ethereal program, i note that, the program send msql sync packet, but the MSSQL machine reply with RESET packet.

PLs can any one advice me.