Eclipse 3.2.1 is not (and never) was supported on Windows 7. Eclipse 3.2.1 came out long before Windows 7. While I can appreciate that your workplace policy dictates that you must use this version of Eclipse (likely to backport a maintenance issue) they should not be dictating that you must use this version with an incompatible OS. If you really must use this version (which, as others have mentioned, is almost 8 years old) you should be running it on a compatible OS.
The list of target Operating Systems for 3.2.1 are available here: http://www.eclipse.org/eclipse/development/readme_eclipse_3.2.1.html