The problem is that none of the players released are not compatible with Windows 7. According to the information found on one of the Olympus websites, the application is compatible with the following Windows versions: Windows 2000, XP, and Vista.
If you are in Windows 7, right click the setup package and select Properties > Compatibility > Windows XP then attempt a possible installation. If it still doesn't work, then it means the application isn't compatible with Windows 7 at all. You need to find another alternative to DSS Player Pro.