sql server jdbc问题

jdbc3.0  +  sql server2008联接串jdbc:sqlserver://localhost:1433;databaseName=users;user=sa;password=server1234;用sa 和server1234在sql管理器里可以登陆，在里面写查询语句也可以。但是用java出现下面的异常
com.microsoft.sqlserver.jdbc.SQLServerException: 用户 'sa' 登录失败。
        at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError
(SQLServerException.java:197)
        at com.microsoft.sqlserver.jdbc.TDSTokenHandler.onEOF(tdsparser.java:246
)
        at com.microsoft.sqlserver.jdbc.TDSParser.parse(tdsparser.java:83)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.sendLogon(SQLServerC
onnection.java:2529)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.logon(SQLServerConne
ction.java:1905)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.access$000(SQLServer
Connection.java:41)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection$LogonCommand.doExecu
te(SQLServerConnection.java:1893)
        at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:4575)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLSe
rverConnection.java:1400)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLSer
verConnection.java:1045)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConne
ction.java:817)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerCon
nection.java:700)
        at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.
java:842)
        at java.sql.DriverManager.getConnection(DriverManager.java:582)
        at java.sql.DriverManager.getConnection(DriverManager.java:207)
        at ConnectTest.getConnection(ConnectTest.java:22)
        at ConnectTest.readDataBase(ConnectTest.java:37)
        at ConnectTest.main(ConnectTest.java:66)
Error Trace in getConnection() : 用户 'sa' 登录失败。
Error: No active Connectionsa用户