The first thing to check in this situation is the JDBC URL that you are using. By default, this should be as follows:
jdbc:easysoft://server_name:8031/DSN
In the above instance, the Easysoft JDBC-ODBC Bridge client will try to connect via port 8031. If this is an invalid port number, the connection will hang. To stop this happening, edit the URL to contain a valid JDBC-ODBC Bridge Server port number, such as 8831.