version 1.4.2_03 of the jvm is not suitable for this product. 1.5 or greater is

Go to the directory where eclipse is installed and find a file called eclipse.ini. Open it and add the following line
-vm
 C:\Java\JDK\1.5\bin\javaw.exe
        Make sure:
        1.) You add that text before any -vmargs option that may be in that file.
        2.) The -vm is on its own line and the path to javaw.exe is on its own line.
        3.) You specify the full path to your JDK 1.5's javaw.exe