Hi yumyorngecrayons,
I’m not sure what you’re trying to do that causes that error message. However, here’s a quick very basic howto.
0. Download and install the latest Java 5.0 (JDK 1.5).
1. Download Eclipse 3.2.1 from http://eclipse.org
2. Download MyEclipse 5.1.0 from us.
3. Unzip Eclipse to a new directory, for example C:\eclipse
4. Unzip MyEclipse to a new directory, for example C:\myeclipse5.1.0
5. Start Eclipse by double clicking on the eclipse.exe
6. Go through the manual install instructions provided with MyEclipse.
Hope this helps!