Hi, if you have an outdated Java version, it won't work, you should update to Java 7 (there's a discussion on the subject in the forum).
If Java is up to date, you should do the following:
1. Open jSQL,
2. Type the url of your site at the top of the main window,
3. Click on the tab "Admin page" on the left,
4. Select any or all pages in the list,
5. Click on button "Test admin page(s)",
6. Wait for the end of process.