We have purchased Drug Synthesis Database from Synthline Prous Science. Even though the version is from October 2006, we still would like to use it. However it doesn't work properly on a 64-bit version of Windows. We can install the database and can scroll through the 9600 end products, 15000 synthesis schemes etc. but it cannot engage the search engine, which we need. It tells a file is missing or invalid. Can you please help us to solve this problem? If you need more information just let us know.