The CEC web-application can test its own installation and most of its configuration before it is registered. Please run through the following tests.
The CEC contains the Apache Axis technology for web services. If Axis is not working, then the CEC does not work. You should test Axis as soon as you have the CEC installed.
Run the Axis tests using the "Axis test" command from the left-hand side-bar. The test checks for the presence of JARs of code. You need all the core libraries to be present; the optional libraries are not required.
If Axis is not happy, there are three possibilities.
When you have the CEC configured you can test the configuration using the Installation test command from the left-hand side-bar.
If you get a test-failure here then either your configuration is not quite right (likely) or the WAR that you downloaded from AstroGrid has a bug (less likely but worth considering). If you can't see a problem in the configuration then please contact AstroGrid for support. In this case please include the information from running the "Fingerprint" sidebar menu, which shows the current configuration in detail.
When all is configured, use the "Test run of application" link from the sidebar. This lets you invoke the configured applications locally. They should all work. However, any applications that produce big output-files won't work gracefully as they will return the output to the browser, not to VOSpace.
If you get a test-failure here, then the problem could be in your configuration or could be a bug in the WAR you downloaded from AstroGrid. The problem could also be in the Java class that constitutes the application. Try calling the class in a unit test to see if it's working.