Note If you get the error "Exception in thread "main" : Bad version number in .class file", the Easysoft JDBC-Access Driver is incompatible with the JBuilder JRE. If you have not already done so, install JRE or later on the Easysoft JDBC-Access Driver machine . In the JBuilder Package Explorer, right-click Easysoft and click Properties . In the Libraries tab, click JRE System Library [jre] , and then click Edit . Click Installed JREs . Click Add . Click Standard VM and then click Next . Click Directory , and then browser to the JRE folder. For example, C:\Program Files\Java\jre6. In the Edit Library dialog box, click Alternate JRE , and the select your JRE in the list.