sybase数据库超时问题求解答

Exception in thread "main" java.sql.SQLException: JZ006: 捕获到 IO 例外:java.net.ConnectException: Connection refused: connect
at com.sybase.jdbc3.jdbc.ErrorMessage.raiseError(ErrorMessage.java:552)
at com.sybase.jdbc3.jdbc.ErrorMessage.raiseErrorCheckDead(ErrorMessage.java:856)
at com.sybase.jdbc3.tds.Tds.handleIOE(Tds.java:3624)
at com.sybase.jdbc3.tds.Tds.login(Tds.java:448)
at com.sybase.jdbc3.jdbc.SybConnection.tryLogin(SybConnection.java:247)
at com.sybase.jdbc3.jdbc.SybConnection.regularConnect(SybConnection.java:223)
at com.sybase.jdbc3.jdbc.SybConnection.(SybConnection.java:198)
at com.sybase.jdbc3.jdbc.SybConnection.(SybConnection.java:132)
at com.sybase.jdbc3.jdbc.SybDriver.connect(SybDriver.java:179)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at com.kayak.util.MysqlUtil.main(MysqlUtil.java:18)