problem installing

Hi i have the same problem as Joost de Folter, did the same thing as well.
The installer stops at 38% on setting up the installer. This is the
message i get after ending the program.

java.lang.InternalError: jzentry ==0
at java.util.zip.ZipFile$2.nextElement(Unkown Source)
at com.installshield.archive.ArchiveReader.entries(ArchiveReader.java:69)
at
com.installshield.archive.StandardResourceReaderFactory.archiveEntries(StandardResourceReaderFactory.java:44)
at
com.installshield.archive.ArchiveWriter.putArchive(ArchiveWriter.java:342)
at
com.installshield.product.actions.uninstallerArchiv.createClassWriter(UninstallerArchive.java:633)
at
com.installshield.product.actions.UninstallerArchive.writeUninstaller(UninstallerArchive.java:369)
at
com.installshield.product.service.product.PureJavaProductServiceImpl$InstallProduct.install(PureJavaProductServiceImpl.java:4661)
at
com.installshield.product.service.product.PureJavaProductServiceImpl$Installer.execute(PureJavaProductServiceImpl.Java:3758)
at
com.installshield.wizard.service.AsynchronousOperation.run(AsynchronousOperation.java:41)
at java.lang.Thread.run(unknownSource)

I hope this can help solve whatever the problem may be or be able to help
you tell me what i need to fix it. I appreciate any and all help that you
can give me.