JDBC - Sybase Connectivity Issue

I'm a Java beginner.When using the java JDBC i'm experiencing the following issues
Connection string used - jdbc:sybase:Tds:<Serverip>:<ServerPort>
Driver File - com.sybase.Jdbc2.Jdbc.SybDriver
Initially when i tried using these values i'm able to establish the database connection.But recently i changed the machine name.I'm using the same machine for both Database and Java.After the machine name changes i'm getting the following error
SQLException:Jz006:caught IOException:java.net.connect Exception.
Please help me...

Just rename back the host. Do it work?
See [http://tmaj.pathology.jhmi.edu/doc/manual/FAQs.html#DATABASE_TROUBLESHOOTING]
I found somewhere that
Note: The following exception occurs when you click Test Connection to connect a Sybase data source from the administrative console.
Test connection failed for data source isagent on server server1 at node
svtaix24Node01 with the following exception: java.lang.Exception:
java.sql.SQLException: JZ006: Caught IOException: java.net.ConnectException: A
remote host refused an attempted connect operation.DSRA0010E: SQL State = JZ006,
Error Code = 0
This exception occurs when the Sybase data source port number is not matched to the port configured in Sybase server.
The default port number is 5000.
Check the port number of your Sybase server in the interfaces file under /<sybase install directory>.

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weel i am able to connect to oracle and execute some query.
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[email protected]

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JDBC connection issue's HELP!

import java.sql.*;
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try this instead:
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stmt.close();
}catch(Exception e){
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Looks like you might be using blank password to connect to your Sybase database. Creator IDE data sourcesare configured as connection pools when deploying to the bundled AppServer. We have a known issue that the AppServer fails to connect to connection pools with blank passwords. Try with non-blank password and confirm if it works.

JDBC - Sybase Connectivity Issue

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