There are many reasons why Discoverer Plus is not responding as you would like, it could be anything from the speed of your computer to network traffic to the load on the application servers but there is one issue that you may be able to fix that will help greatly. Discoverer Plus is not very compatible with the newest version of JAVA.
You should be running J2SE Runtime Environment 5.0 Update 15
If you don't know the version you are running, click here to find out
To get the proper version of JAVA on your computer follow these steps:
First, remove all Java versions from your computer.
Next, Install the correct JAVA version for Discoverer: